Polukranos Reborn/Polukranos, Engine of Ruin Hydras never die Polukranos Reborn is a three-mana Green 4/5 with reach, so it can block flying creatures
We've also had a better look at Final Fantasy, Tarkir Dragonstorm, and Spider-man, fleshing out this year's remaining releases
You might not want to attack every turn with the Titan since you'll likely quickly have way too many cards in hand, especially if you're playing a token build, but even then, having more options is better than none
If you are looking for inspiration I suggest looking at the most popular commanders of all time which are listed here
Slick Sequence This is my hottest take, I think, but Slick Sequence will make Izzet prowess decks finally viable again, down the chain from Standard to Modern
Is Dredge an Activated Ability