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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!


primarycoloursGreen  Blue  White  Red  Black 
highpriorityMass Removal (Land)EvasionAnthemMass PumpDirect DamageTempoBounce (Creature)PumpBounceCombat TrickRemoval (Non Land Permanent)Removal (Edict)Removal (Exile)Removal (Creature)Removal (Damage)AggroAnti-ControlAnti-DrawRemoval (Land)
lowprioritySac Outlet (Creature)Anti-AggroAnti-RemovalTutor (All)Recursion (Creature)Card FilterThreaten EffectClone (Creature)Mass BounceCares About (Power)Removal (Enchantment)Lure EffectCard SelectionCard DrawTapperControl (Creature)Anti-Life GainCard AdvantageDeath TriggerSaboteurBounce (Own Creature)ManlandCares About (Creature)Cares About (Small Hand Size)Removal (Permanent)Anti (Control Creature)Tutor (Creature)Removal (Artifact)
unwantedtagsReanimation TargetMass Removal (Creature)FinisherMass Removal


primarycoloursGreen  Blue  White  Red  Black 
highpriorityCounterspellManlandTutor (All)Tutor (Creature)AccelerationCard SelectionCard DrawCantripFinisherMass Removal (Creature)Mass RemovalHand DisruptionRemoval (Non Land Permanent)Removal (Edict)Removal (Permanent)Removal (Exile)Removal (Creature)Removal (Damage)
lowpriorityTutor (Sorcery)Control (Player)Anti-AggroAnti-RemovalCard FilterRemoval (Planeswalker)Extra TurnBounceAnti-TokensCombat TrickClone (Creature)Mass BounceRemoval (Enchantment)Removal (Non Creature Permanent)Tutor (Artifact)FatesealClone (Sorcery)Tutor (Equipment)TapperControl (Creature)ShuffleRemoval (Land)Fog EffectCard AdvantageTutor (Enchantment)Life GainClone (Instant)Control (Permanent)Tutor (Land)DiscardFattieTutor (Instant)Cares About (Big Hand Size)Needle EffectCares About (Few Creature)Removal (Artifact)
unwantedtagsAggroStormFinisherCares About (Creature)Card Disadvantage


primarycoloursBlue  Red  Black 
requiredtagsCares About (Artifact)Cares About (Artifact Creature)
highpriorityCheat Into Play (Equipment)ManlandStasis EffectRecursion (Artifact)Sac Outlet (Artifact)Tutor (Artifact)Tutor (Equipment)Tutor (All)Clone (Artifact)Cares About (Artifact)Cares About (Artifact Creature)Cheat Into Play (Artifact)
lowpriorityAnti-ControlCard SelectionCard DrawBounce (Own Artifact)Bounce (Artifact)Needle EffectManlandRemoval (Creature)Card Advantage


highpriorityRecursion (All)Recursion (Artifact)Recursion (Instant)Recursion (Enchantment)Recursion (Creature)Recursion (Sorcery)Recursion (Land)Graveyard HateAnti-DrawCares About (Discard)Discard
lowpriorityAnti-ControlCard DrawNeedle EffectManlandRemoval (Creature)Card Advantage


primarycoloursBlue  Green  Black 
highpriorityRecursion (All)Recursion (Artifact)Recursion (Instant)Recursion (Enchantment)Recursion (Creature)Recursion (Sorcery)Recursion (Land)Card SelectionCantripCard FilterCares About (Graveyard)Cares About (Discard)DiscardDiscard OutletSelf Mill
lowpriorityDeath TriggerTutor (Sorcery)Tutor (All)ManlandTutor (Instant)Reanimation TargetCard DrawReanimation SpellGraveyard HateTutor (Creature)Fog EffectCard Advantage


primarycoloursGreen  White  Red 
highpriorityAccelerationSac Outlet (Creature)Sac Outlet (Permanent)Stax EffectStasis EffectLure EffectTokensCares About (Tokens)AnthemMass Pump
lowpriorityTutor (All)Removal (Planeswalker)Extra TurnAnti-TokensAnti-DrawCombat TrickClone (Creature)Mass BounceEnters The Battlefield TriggerRemoval (Non Land Permanent)Card DrawBlinkDirect DamageAggroCard AdvantageDeath TriggerBounce (Own Creature)Anti-ControlPumpRemoval (Creature)Removal (Damage)Cares About (Creature)Removal (Permanent)Tutor (Creature)


primarycoloursBlue  Red  Black 
requiredtagsReanimation Spell
highpriorityDiscard OutletReanimation TargetFattieCard SelectionCard DrawCantripCard FilterDraw 7Card AdvantageSelf RecursionReanimation SpellReanimation SpellCheat Into Play (Creature)Cheat Into Play (Non Land Permanent)Cheat Into Play (Permanent)Recursion (All)Recursion (Artifact)Recursion (Instant)Recursion (Creature)Recursion (Sorcery)Recursion (Land)Tutor (All)Tutor (Creature)Removal (Non Land Permanent)Removal (Edict)Removal (Permanent)Removal (Exile)Removal (Creature)Removal (Damage)Self Mill
lowpriorityMass Removal (Creature)Mass RemovalSac Outlet (Creature)MillDiscardCares About (Graveyard)ShuffleAcceleration


highpriorityFattieMass Removal (Land)AccelerationRemoval (Non Land Permanent)Removal (Edict)Removal (Permanent)Removal (Exile)Removal (Creature)Removal (Damage)Ritual EffectCheat Into Play (Creature)Cheat Into Play (Non Land Permanent)Cheat Into Play (Permanent)
lowpriorityAnti-AggroAnti-RemovalTutor (All)Card FilterRemoval (Planeswalker)Removal (Creature)Removal (Damage)Removal (Non Land Permanent)Cares About (Creature)Card SelectionCard DrawRemoval (Permanent)Tutor (Creature)Card Advantage
unwantedtagsCard Disadvantage


primarycoloursBlue  Red  Black 
highpriorityCard SelectionCard DrawCard FilterAccelerationDirect DamageRemoval (Damage)Tutor (All)Free SpellRitual EffectRecursion (All)Recursion (Instant)Recursion (Sorcery)Draw 7StormExtra TurnTutor (Artifact)Untap Lands
lowpriorityMass RemovalClone (Spell)Anti-AggroSilence EffectManlandCard Advantage