mtg gotcha cards Keeper of the Sacred Word [Unhinged] return Cardpecker from your graveyard to your hand. Not the trickiest “gotcha”, but

These include Sigardas Aid as Captain Americas Aid, Flawless Maneuver, In the Trenches, and Sword of War and Peace as Shield of War and Peace

(To mill a card, a player puts the top card of their library into their graveyard.) Whenever one or more Rogues you control deal combat damage to a player, that player mills a card for each 1 damage dealt to them

These types of cards can't do much against board wipes, meaning that a single sweeper can send you back to the drawing board

For example, if youre on the play and your starting hand after a mulligan contains a one-drop, two two-drops, two four-drops and two five-drops, then I will usually start on turn one by inking the worst four-drop

That said, if your deck does run Equipment, +1/+1 counter effects, or anthems, Esper Sentinels tax can get truly untenable, virtually guaranteeing you three or more cards per turn cycle