One of the original dragons, one of the great elder legends, the source from whom all other dragons flowed
Getting to cast Channel in Commander is a hell of a drug, and thankfully its gated behind a three drop that then needs you to have a power seven or greater creature, and then have that three drop (and you!) survive a full turn cycle
Then you put a permanent card from among the milled cards onto the battlefield under your control
But to make that ability available for just two mana a tiny fraction of what might be available to a player at the time ensures that Time Walk can steal a match in completely unfair ways
Then recommit him with these two to trigger his willpower boost a second time
If you're a Sealed Deck veteran, you may want to skip ahead to the next section, where I talk about some of the differences you can expect at your local store for Dominaria