Griffin, The Grim Geeker

As an additional cost to cast Griffin, The Grim Geeker,
pay any amount of life, then gain geek counters equal
to your life total

Griffins power is equal to twice the amount of geek counters you have

If you have 10 or more geek counters, you lose the game

{4}: Geek, any player may activate this ability during
their main phase