For example, a Siege card like Invasion of Llorwyn will be exiled and can be cast by the controller without paying its mana cost, even if another player defeated the battle for them
And unlike Gishath, Ghalta can be built for reasonably cheap
Each creature you control gains an ability that puts +1/+1 counters on itself equal to the mana it produces whenever you tap it for mana
If you are aggressively countering cards like Chrome Mox or Mox Diamond, you can really slow down these decks and force them to a fairer axis quickly
Losing 3 resources (a card in hand, a creature, and mana) to draw two seems pretty fair in red, considering most red cards give impulse card draw in the form of exile ityou may play it until end of turn
Magic: The Gathering Arenas economy can be a tricky thing to work around