Rhythm of the Wild makes it so your creatures cant be countered and gives them all riot, letting you choose to give them haste or a +1/+1 counter which is nice depending on the board
K'rrik will also be a target the second he hits the board, so be sure to run protection or reanimation like Beacon of Unrest to keep him on the board.
You don't have to reveal the enchanted card while it's in your hand
This IS an equipment, and RW cares about that, so it probably gets played more often than it would in most formats Lots of sets lately seem to have an Artifact that is a removal spell, and it is nice that you can play them in any deck, but they tend to be pretty inefficient, and thats kind of the case here
9) Breena, the Demagogue : Growing your army off other players attacking each other is great
Borrowing an idea from another trading card game we make ( Duel Masters ), we tried using both sides of the card