Hydra Ancient

Trample, reach, and hexproof
hydras you control cost {1} less to cast for each time you cast you commander from the command zone this game (minimum of 1)
hydras you control gain +1/+1 for each time you cast you commander from the command zone this game (minimum of 1)
As long as your devotion to green is 10 or greater, hydras you control have trample, reach, and hexproof.