In an Eternal format like Commander, players have access to so many cards that you can take an otherwise basic mechanic (like gaining life) and turn it into so much more
Aside from those situations, though, Mewtwo EX and Gardevoir can stomp almost everything which comes at it: you can get to take advantage of Psychics massive power without the slow, plodding build-up
TOTAL CARD MANAGEMENT: Tired of scattered cards
Work, play, and stay connected during an emergency without worry
With that said, if your ramp, fixing or color balance is able to support the cost, I hear Wurmcoil Engine is a pretty nice magic the gathering card
that opponent's monster's ATK becomes 0 until the end of this turn, also for that battle, monsters cannot be destroyed by battle and neither player takes battle damage