Scan, price, trade, and build decks all in one app, powered by Dragon Shield.
It isnt just a pre-requisite to cast your commander, it's also how you can make up for the fact that the non-bomb cards in this deck are often mediocre ways to ping each opponent for 1 damage
Once per turn, you may turn a card with an inkwell symbol from your hand into face-down ink, becoming a resource that you can turn sideways to summon characters You use 60-card decks in Constructed, 40-card decks in Limited, and the official website has an excellent "how to play" section
(Choose any number of permanents and/or players, then give each another counter of each kind already there.) The set of permanents affected by Mutational Advantage is determined at the time Mutational Advantage resolves
Burning-Rune Demon is similar to that and costs one less
There's more benefit with more opponents