First strike
When Cemetery Gatekeeper enters, exile a card from a graveyard.
Whenever a player plays a land or casts a spell, if it shares a card type with the exiled card, Cemetery Gatekeeper deals 2 damage to that player.
Card types that can be exiled from a graveyard include artifact, creature, enchantment, land, planeswalker, instant, and sorcery. Legendary, basic, and snow are supertypes, not card types. Human, Equipment, and Aura are subtypes, not card types.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.