mtg ixalan vampire cards Call to the Feast [Ixalan] An individual card from the Magic The Lost Caverns of Ixalan

In practice, there arent too many dedicated payoffs though

The most critical is the size of your collection

Archmages Charm is extremely pushed, a solid permission spell, a good way to build card advantage for hitting land drops, and a fantastic tool against Deaths Shadow, Wild Nacatl, Goblin Guide, Pyxis of Pandemonium, Champion of the Parish, Aether Vial, Delver of Secrets, Hardened Scales, Amulet of Vigor, Benthic Biomancer, Glistener Elf, Noble Hierarch, Viscera Seer, and sometimes even Hexdrinker (just to mention a few)

They should help you win once Dragonstorm finds them

The most extreme example of this is the One of One Ring