Sailex Marrow, Monk

Whenever Sailex Marrow, Monk enters the battlefield, it gains X +1/+1 counters, where X is
the amount of token creatures you control.
Whenever another creature dies, you may pay {r}{r}, if you do, Sailex Marrow, Monk deals
damage equal to its power to target creature.
If this is the third time this ability has resolved, transform Sailex Marrow, Monk.