Which means, I think, that you can actually skimp on the overall number of lands in your deck
Seeing as this deck only utilizes a Stage one and a Basic Pokemon, you can keep the Pokemon in your deck down to six cards
Kalastria Healer's rally ability gains you one life and makes your opponents lose one life
Galadriel could be a viable inclusion in Bant-colored Blink decks in Commander, where players might be able to trigger her ability multiple times
Other must kill creatures provide multiple targets for removal, making it harder for an opponent to ensure they can take care of Niv-Mizzet
For example, if you've got an extra Sol Ring laying around and feel that the deck has just the right amount of ramp, take out Mind Stone for it