The Japanese leaked the Monster Commanders of AFC Decks.
"Looks like:
5RG
Legendary Creature - Dragon
Flying, haste
Whenever ~ attacks, add X mana in any combination of colors, where X is the total power of attacking creatures. This mana can only be used to cast spells. Until end of turn, this mana isn't lost as steps or phases end.
4/4
2WUB
Legendary Creature - Horror
When ~ enters the battlefield, for each opponent, tap up to one untapped creature you control. When you do, choose target creature that player controls with power less than or equal to the power of the tapped creature. You control that creature as long as you control ~.
Whenever you attack with a creature an opponent owns, you gain 2 life and the player who owns that creature loses 2 life.
3/5
3RB
Legendary Creature - Beholder
Whenever you attack a player, goad target creature that player controls. Tap it.
Whenever an opponent attacks another of your opponents, you and the attacking player each draw a card and lose 1 life.
5/5
4GWU
Legendary Creature - Giant
Ward 3
Other creatures you control have ward 3.
Whenever ~ enters the battlefield or attacks, choose one or both of the following:
Target creature's base power and toughness become 7/7 until end of turn.
Target creature's base power and toughness become 1/1 until end of turn.
7/7
Might be missing something about tapping in the beholder's ability, I wasn't sure how to interpret that."
The Dragon appears to be Klauth, some people were disappointed Klauth wasn't the Red Dragon Legendary so I expect to sell well.