Zael, False Sea Idol

Submerge costs of creature spells you cast cost {1} less to cast for each submerged creature you control.
{1}{u}{u},{t}: Turn one submerged creature you control face up. It gets +1+1 until end of turn.
{1}{u},{t}: Turn a face up creature you control with submerge face down. It becomes a 1/1 creature token with protection from red.