
DeathtouchDeathtouchAny amount of damage this deals to a creature is enough to destroy it.
Whenever Winter attacks, millmillPut that many cards from the top of a library into its owner's graveyard. three cards.
DeliriumDeliriumAbility word: is active while four or more card types are among cards in your graveyard. — At the beginning of your end step, you may exile any number of cards from your graveyard with four or more card types among them. If you do, put a permanent card from among them onto the battlefield with a finality counter on it.
Hover an underlined rule to see what it means.
Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.