Deadly Disguise (Red-Green-White) will centre on Disguise cards - seemingly an as-yet unrevealed keyword - while Revenant Recon (Blue-Black) is full of Surveil and creature resurrection
If you know you need to run graveyard hate but dont want to remove one of your more fun cards, then this may be the option for you
When Storm gets involved, this pumps your whole board multiple times over, turning even a group of 1/1s into a lethal strike
Ariel, Sonic Warrior is a fitting entry for the top of this list too, given that Ursulas Return features Ariels nemesis, Ursula the Sea Witch, as a big part of its story
Doctor's companion (You can have two commanders if the other is the Doctor.) Whenever Donna Noble or a creature it's paired with is dealt damage, Donna Noble deals that much damage to target opponent
Unsurprisingly, Wizards of the Coast was not too happy about this detail