Unlike combat, which is at the mercy of life totals, alternate wins put a definite clock on the game
What keeps this from being truly bonkers is that often players wont attack anyway and are content to leave guys back on defense and play for the long game
If a resolving spell or ability instructs a specific creature to connive but that creature has left the battlefield, the creature still connives, although you can't put any +1/+1 counters on it
Bonepicker Skirge Epic Confrontation Epic Downfall Epic Experiment Epic Fight Epic Proportions Epic Struggle Epicenter Epicure of Blood Heirloom Epic Radiant Epicure Really Epic Punch Voldaren Epicure
However, effects that stop a creature from untapping "during your untap step" or "during its controller's untap step" won't stop that creature from untapping during another player's untap step, and as such, Prop Room's ability will cause that creature to untap
Because her ability allows you to add other characters strengths to hers, people are on the hunt for this card