Frieza, Galactic Overlord

Zenkai 1

If a permanent you control becomes targeted by a spell, counter that spell and Zenkai Boost.(Only cards with Zenkai 1 can be your commander. If a card with Zenkai 1 is your commander, you may have a Zenkai Deck containing one copy of each additional form for that character. When Zenkai Boosting, place the boosted card into the Zenkai Deck, and select a card with a Zenkai level 1 above or below the boosted cards level. The selected card is now your commander.)