Hatrix, The Bone Dragon

Flight
For every dragon that is on your deck, give
this card trample for that number of turns.

When Hatrix, the Bone Dragon enters the battlefield, if there is three or more power on a mountain or a swamp card, stop all the creatures below a power of three for two turns on your opponent's team.

{r}{r} Control all the mountain types or swamp types on your opponent's team.