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

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

With each reintroduction of the creature type, Wizards has reached deeper into the pool of keywords and mechanics for every Sliver [you control] to share

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

Monsieur D'Arque, Despicable Proprietor Archazia's Island's Ruby and Sapphire deck is a meta-friendly package that's ripe for upgrading