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One of the most important aspects of CastleAI, and indeed the main reason that is represents a significant improvement over CubeTutorAI is its ability to draft to a strategy.

Imagine that you first picked an Animate Dead and along comes the second pack with amongst other things Damnation, Doom Blade and Entomb. What do you pick? CubeTutorAI would say "Damnation is the highest rated card so I will pick it". Whilst it is reasonable in a naive case to just pick the "best" card in your colours, most human drafters don't think that way. They will ask the question, "Which of these cards works the best with the cards that I've already chosen?". The clear answer to that question in this case is Entomb which combos well with Animate Dead and will send our draft in a Reanimator direction.

CastleAI thinks like this too!

The first few picks in a draft are informed mostly by Card Quality and Signal Strength but as the draft progresses Castle AI builds up a model of the strategy or strategies that it is drafting towards. In order to do so it needs to have some knowledge of what the cards that it's drafting actually do! Enter The Categoriser! Thanks to you guys, The Cube Tutor community we now have an extensive database detailing the main function of thousands of cards.

You can see the tags for a card by clicking on a card name or picture anywhere on the site, e.g. Ancestral Recall,. To see a list of all cards marked with a particular tag, just click on that Tag: Card Draw

Strategy Elements

A CastleAI Strategy has a few key elements
  • Required Tags - Without posessing card(s) with these properties it is impossible to be in the strategy. For example you must have a Reanimation Spell to be a Reanimator deck.
  • High Priority - Cards with these properties are the bread and butter of the strategy and will fill out the majority of the final deck.
  • Low Priority - It is desirable to draft cards with these properties.
  • Unwanted Tags - Cards with these properties will be actively avoided.
  • Primary Colours - The colours that best support the strategy.
  • Curve Template - The desired curve differs from strategy to strategy.

Contributing to the Pick Decision

Strategy is just one aspect of CastleAI and contributes to the final pick decision by scoring each card in a pack. A card will score well for strategy if it has more Required properties, High or Low Priority properties is in a Primary Colour and fits well on the curve of our previously drafted cards.

Fully Extensible

Below you will see a complete definition of all of the strategies that are currently supported by Castle AI. It is straightforward to add new strategies and modify existing ones so this page will serve as a living document of the current strategies supported in Castle AI. If you would like to propose a new strategy for the AI, then please suggest it!


primarycoloursBlack  Green  Blue  White  Red 
highpriorityRemoval (Land)Mass Removal (Land)Direct DamageEvasionMass PumpAnthemTempoPumpBounceCombat TrickBounce (Creature)Removal (Creature)Removal (Non Land Permanent)Removal (Exile)Removal (Damage)Removal (Edict)AggroAnti-ControlAnti-Draw
lowpriorityTutor (All)Death TriggerTapperCard SelectionSac Outlet (Creature)Anti (Control Creature)SaboteurLure EffectClone (Creature)Recursion (Creature)Card AdvantageRemoval (Permanent)Removal (Enchantment)Cares About (Small Hand Size)Anti-Life GainThreaten EffectManlandAnti-RemovalBounce (Own Creature)Cares About (Power)Anti-AggroTutor (Creature)Removal (Artifact)Cares About (Creature)Card FilterCard DrawMass BounceControl (Creature)
unwantedtagsMass RemovalMass Removal (Creature)FinisherReanimation Target


primarycoloursBlack  Green  Blue  White  Red 
highpriorityCantripCard DrawCard SelectionMass RemovalMass Removal (Creature)Tutor (All)Tutor (Creature)ManlandRemoval (Creature)Removal (Non Land Permanent)Removal (Exile)Removal (Permanent)Removal (Damage)Removal (Edict)AccelerationCounterspellHand DisruptionFinisher
lowpriorityAnti-TokensRemoval (Land)Life GainRemoval (Planeswalker)TapperCombat TrickTutor (Land)Removal (Non Creature Permanent)Clone (Sorcery)Clone (Creature)Tutor (Instant)Card AdvantageShuffleRemoval (Enchantment)Extra TurnTutor (Artifact)Tutor (Equipment)Anti-RemovalCares About (Big Hand Size)Anti-AggroFattieCares About (Few Creature)FatesealRemoval (Artifact)Tutor (Enchantment)Card FilterBounceControl (Player)Tutor (Sorcery)Fog EffectDiscardControl (Permanent)Clone (Instant)Needle EffectMass BounceControl (Creature)
unwantedtagsAggroCares About (Creature)StormCard DisadvantageFinisher


primarycoloursBlack  Blue  Red 
requiredtagsCares About (Artifact)Cares About (Artifact Creature)
highpriorityStasis EffectCheat Into Play (Artifact)Recursion (Artifact)Sac Outlet (Artifact)Cares About (Artifact)Cares About (Artifact Creature)Clone (Artifact)ManlandTutor (Equipment)Tutor (All)Tutor (Artifact)Cheat Into Play (Equipment)
lowpriorityAnti-ControlRemoval (Creature)Card DrawCard AdvantageBounce (Own Artifact)Card SelectionNeedle EffectBounce (Artifact)Manland


highpriorityRecursion (Enchantment)Recursion (Artifact)Recursion (Land)Recursion (Instant)Recursion (Creature)Recursion (All)Recursion (Sorcery)Cares About (Discard)DiscardGraveyard HateAnti-Draw
lowpriorityAnti-ControlRemoval (Creature)Card AdvantageCard DrawNeedle EffectManland


primarycoloursBlack  Green  Blue 
highpriorityCares About (Discard)Discard OutletDiscardSelf MillCard FilterCantripCard SelectionRecursion (Enchantment)Recursion (Artifact)Recursion (Land)Recursion (Instant)Recursion (Creature)Recursion (All)Recursion (Sorcery)Cares About (Graveyard)
lowpriorityTutor (All)Death TriggerTutor (Creature)Tutor (Instant)Graveyard HateReanimation TargetCard AdvantageCard DrawTutor (Sorcery)Fog EffectReanimation SpellManland


primarycoloursGreen  White  Red 
highprioritySac Outlet (Permanent)Sac Outlet (Creature)Cares About (Tokens)TokensAccelerationMass PumpAnthemStax EffectStasis EffectLure Effect
lowpriorityAnti-TokensTutor (All)AggroRemoval (Planeswalker)Death TriggerCombat TrickDirect DamageClone (Creature)Card AdvantageRemoval (Permanent)Extra TurnAnti-ControlEnters The Battlefield TriggerBounce (Own Creature)Removal (Non Land Permanent)Tutor (Creature)Removal (Damage)Anti-DrawCares About (Creature)PumpRemoval (Creature)BlinkCard DrawMass Bounce


primarycoloursBlack  Blue  Red 
requiredtagsReanimation Spell
highprioritySelf MillDiscard OutletTutor (All)Tutor (Creature)Self RecursionReanimation SpellRecursion (Artifact)Recursion (Land)Recursion (Instant)Recursion (Creature)Recursion (All)Recursion (Sorcery)Cheat Into Play (Creature)Cheat Into Play (Permanent)Cheat Into Play (Non Land Permanent)Reanimation SpellDraw 7Card FilterCantripCard DrawCard AdvantageCard SelectionReanimation TargetFattieRemoval (Creature)Removal (Non Land Permanent)Removal (Exile)Removal (Permanent)Removal (Damage)Removal (Edict)
lowpriorityMass RemovalMillMass Removal (Creature)ShuffleDiscardAccelerationCares About (Graveyard)Sac Outlet (Creature)


highpriorityAccelerationFattieCheat Into Play (Creature)Cheat Into Play (Permanent)Cheat Into Play (Non Land Permanent)Mass Removal (Land)Ritual EffectRemoval (Creature)Removal (Non Land Permanent)Removal (Exile)Removal (Permanent)Removal (Damage)Removal (Edict)
lowpriorityAnti-RemovalTutor (All)Removal (Planeswalker)Removal (Non Land Permanent)Anti-AggroTutor (Creature)Card SelectionRemoval (Damage)Cares About (Creature)Card FilterRemoval (Creature)Card DrawCard AdvantageRemoval (Permanent)
unwantedtagsCard Disadvantage


primarycoloursBlack  Blue  Red 
highpriorityRecursion (Instant)Recursion (All)Recursion (Sorcery)Card FilterCard DrawCard SelectionDirect DamageRemoval (Damage)Tutor (Artifact)Untap LandsAccelerationExtra TurnTutor (All)Free SpellRitual EffectDraw 7Storm
lowprioritySilence EffectClone (Spell)Mass RemovalCard AdvantageAnti-AggroManland