Yarok, Survivor of Zendikar

Deathtouch, Lifelink
Whenever a creature entering the battlefield
causes an ability of a permanent you control to trigger, that ability triggers X additional times,
where X is the number of Charge counters on
Yarok.
{7}{b}{g}{u}: Put a Charge counter on Yarok.
This ability costs {7} less to activate if this is the
first time you've activated it this game.