Cards like Darksteel Reactor, Helix Pinnacle, or Azor's Elocutors make for useful single-card win conditions
This is a pretty odd way to divide things, but it is what it is
(2024-07-26) If a spell for which the gift was promised is countered, doesn't resolve (perhaps because all of its targets are illegal), or is otherwise removed from the stack, the gift won't be given
Undoubtedly the most impactful of all of these, however, was Deadpool, Trading card, a new staple in high-level Commander, and even a bit player in cEDH
Berserk can seal a game by surprise doubling a creature's power, or it can destroy an attacking creature thats giving you some trouble
The other, more recently introduced, way to get your creatures in the air is through the use of Flying Counters