Watery Grave

({t}: Add {u} or {b}.)
As Watery Grave enters, you may pay 2 life.
If you don’t, it enters tapped.

"Listen here, ya little barnacle. No one, and I
mean no one can ever know about this. It'll be
the end of you, it'll be the end of me. And worst
of all, it'll be the end of me!" - Mr. Krabs