Starcraft 2

Creep Spread enters the battlefield with 1 Creep counter.
, : Spellcast. Add 1 Creep counter to Creep Spread.
Opponent's must pay for each Creep counter on Creep Spread in order to declare an attack.

Larvae enters the battlefield with 1 Larva counter.
, : Spellcast. Add a Larva counter to Larvae.
, : As an additional cost, remove a Larva counter from Larvae. Search your deck for a creature card and put it onto the battlefield.