Seedglaive Mentor is strong enough to pull you into the Mouse archetype, but Im not a big fan of Veteran Guardmouse
One could argue that Orzhov Sewers is simply a new take on this classic MTG strategy, which originally used a Mangara of Corondor/Karakas engine to guarantee inevitable victory
works to incorporate new game mechanics and popular characters from the TV show to remain consistent with those two core pillars of the Pokemon brand, while also paying acute attention into the strategies of competitive players so that the game remains balanced and fresh
Niv-Mizzet, Visionary already works as an infinite combo piece, but the card draw helps assemble other combos plus protection from free spells like Pact of Negation and Force of Will
It seems like you're either drawing two cards for 1cc or killing your opponent's small utility creature while keeping card parity and accelerating the game
So in this case, if you have four Stormbreakers already, then you only need to pay one mana to go infinite, since Sprout Swarm creates a token, and you'll get four new Stormbreakers from the first casting