Rismog, Of Forgotten Realms

Islandwalk, Double strike, reach, trample, haste.
Rismog enters the battlefield with x +1/+1 counters.
Add the beginning of your upkeep, add a depths counters to Rismog.
If there are 10 or more depths counters on Rismog, your opponent exiles their hand, graveyard and all permanents they control.