Sunken Reef

Sunken Reef's Casting Cost is {x} less, where {x} is equal to the amount of Sunken Creatures in
both Players Graveyard, up to {3}.
As long as Sunken Reef is in play, all Sunken Creatures get +0/+1.
When Sunken Reef is exiled or sent to the
Graveyard, create {x} 1/3 Sunken - Crab
tokens.