If one other Merfolk is tapped, Kumena can't be blocked that turn, allowing it to reliably deal commander damage
We wrapped the playtest and went out to dinner
Bruenor is another source of free equips, something that makes more expensive Equipment a lot better
It wont stop cards such as Deadly Rollick from the same cycle of cards and it cant beat the rare Exterminatus , but it definitely removes much of the risk involved with having a large board state if you havent been able to dedicate mana to holding up interaction
Then, if you spend four colorless mana and tap the card, you can "proliferate, then proliferate again." Play your cards right, and you've automatically dealt one player a heap of mean counters
And if you can somehow find a way to bounce him back to your hand, you can do it all over again