Abrupt Decay 2
Youll have an absurd amount of mana on the following turn, which youre likely to get since you just wrathed the board
Decks thinner on ramp shouldn't be daring to go to such high CMCs and should aim for a shortened curve
If it really is a four-of in a tier one deck, its price could be on the rise, especially once Ugin, the Spirit Dragon rotates this spring
But even if you do not want to plan your whole deck around Behemoth K, he is just strong card in general and will be included in many Lightning-Decks for sure, especially since you can search him with [10-086C] Aldo, [9-063L] Gabranth, [11-072R] Tyro and another Card in Opus XIII: Crystal Radiance I also like the idea of running Behemoth K in an aggressive Lightning-Deck with Cards that constantly treating your opponent and trying to deal 7 points of damage very quickly
Abaddon is far and away the best commander for the deck, given its broad ability benefits any play style so long as youre dealing damage to your opponents