Guardian of the Deep

As an alternative cost to cast this spell, you may
pay {2}{g}{w} instead of Guardian of the Deep's
original cost.
When Guardian of the Deep enters the
battlefield, gain control of target artifact,
creature, or enchantment.
When Guardian of the Deep dies, If you paid
Guardian of the Deep's alternative cost, create
a 4/2 green and blue Hydromorph creature
token. Otherwise, create a 2/4 blue and white
Sea Serpent creature token.