The real highlight is its second attack, which deals 70 damage for each Energy discarded from the board
This would be good enough already, since cards exiled with this card can be played at any time, but it also has a built-in way to deal damage to your opponents
Creature - Elf Scout Color tag templates(None) Yavimaya Elder When this creature dies, you may search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle
Deflecting Swat Deflecting Swat is basically the Commander free spell version of Misdirection and comes with all its target-changing effect, but it has even less of a cost (in Commander, at least)
And in addition to all that lovely synergy, Kumena's effects scale really well, drawing cards when the board is small, adding +1/+1 counters to a team that's wide, and growing more and more powerful as you play late game cards like Seedborn MuseSeedborn Muse