Knowledge Vault [Legends] Pro Tour Promos "You may even see them

"You may even see them again

double the number of +1/+1 counters on Primordial Hydra

remove a +1/+0 counter from it

perhaps hooves and claws will make them take notice

{T}: Create a 1/1 colorless Insect artifact creature token with flying named Wasp

Knowledge Vault [Legends] Pro Tour Promos "You may even see themSet: Legends Type: Artifact Rare Cost: {4} {2}, {T}: Exile the top card of your library face down. {0}: Sacrifice Knowledge Vault. If you do, discard your hand, then put all cards exiled with Knowledge Vault into their owner's hand. When Knowledge Vault leaves the battlefield, put all cards exiled with Knowledge Vault into their owner's graveyard.