Another drawback comes from the social aspect
It doesnt have as severe of a mana commitment as other Nivs, costing six mana but just one blue and one red and a bunch of generic mana, so it's much easier to slot into a multicolored deck
A one-sided Stax piece for a single mana that also fuels life-gain decks, it's just something that has to be considered for every white deck, including any Selesnya+ brew that might be thinking about Brightglass GearhulkBrightglass Gearhulk
Whenever an opponent casts a noncreature spell, Gleeful Arsonist deals damage equal to its power to that player
Its initial cost is just three mana, but then every time you cast an instant or sorcery once it's on the battlefield, it gains a +1/+1 counter, unless the mana spent to cast the spell is equal to or less than its power
You can add white reanimation effects like Breath of Life, too, to get these creatures back later