While they're tapped, you develop your board
When converted, Blaster, Morale Booster has modular 3, and an activated ability
She can heal 3 damage from any character and draw up to 3 cards upon entering play, while also questing for an impressive 2 lore
And it pretty much draws us a million cards thanks to Swords to Plowshares
That said, its also a bit easier to maindeck because the power level and average card quality in Modern Horizons seems fairly lower than in Masters setswhich makes sense, considering that the product doesnt have Masters in its name and has drastically different booster and booster box makeup than a Masters set
Phasing has weird rules nuances like not being bothered by Containment Priest, which is also in Core 2021, but ignore this creature until you untap is pretty straightforward