Earthcracking Barbarian
1R
Creature -- Human Barbarian
2/2
Haste, echo -- sacrifice a land
When Keldon Earthcracker comes into play each player sacrifice a land.
A rampaging barbarian.. cos.. I like land sacrificing ^^
It's too strong at 1R.
Game situation, you run your RG aggro deck and play

-> BoP,

-> EB.
Your opponent, starting second, goes back 0 land (essentially a Timewalk for you) while you stay on a single land with the BoP up to play an additional 1cc spell.
You hit for two and don't pay the upkeep. With a second copy, on your turn 3 you can Timewalk your opponent again and
still have an extra mana up if you hit your third land drop. Your opponent is at 16 on 0 lands and his opening 3 land hand is now a one land hand before he plays a spell.
And you're playing an aggressive RG deck with low CCs to offset the mana disadvantage of the EB.