mtg from the vault legends card list Vault: Twenty From the Vault Vault, 53 cards | Magic:

The Swarmlord The Swarmlord hits the battlefield incredibly hard as a massive threat that replaces itselfand any other creature with counterswhen it dies, which poses a variety of problems for your opponents

Unless ramped out early, he could easily be gone before he gets any use

Those two cards have been, at different times, key parts of the most powerful deck in their respective format

Inti, Seneschal of the Sun Inti, Seneschal of the Sun uses a lot of text to basically say, youre gonna be impulse drawing through that deck. Inti stuffs a lot of value into its Grizzly Bears body, guaranteeing youll squeeze damage by with each attack and replace those cards you pitched for the +1/+1 counters