Tombstone Stairwell [Mirage] Innistrad put it on top of

put it on top of its owner's library instead of into that player's graveyard

When you cast this spell

sacrifice Sea Serpent

none of which has changed them one bit

that player discards a card

Tombstone Stairwell [Mirage] Innistrad put it on top ofSet: Mirage Type: World Enchantment Rarity: Rare Cost: {2}{B}{B} Cumulative upkeep {1}{B} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) At the beginning of each upkeep, if Tombstone Stairwell is on the battlefield, each player creates a 2 2 black Zombie creature token with haste named Tombspawn for each creature card in their graveyard. At the