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You have no maximum hand size and dont lose the game for having 0 or less life

Case in point: Toxrill, the Corrosive, one of the most annoying top-end cards ever

It's a great catch-all answer in formats where lots of cheap permanents flood the board, especially in colorless or control decks

Grand Arbiter AugustinIV The problem that Grand Arbiter has is that you are both playing a tempo-you-can't-do-things build while the player is not even bothering to end the game quickly

Try a Ruby Medallion to keep your red spells cheap, and use Koth, Fire of Resistance to dig up Mountains and keep the spells coming

Second, it is in artifact so opens this effect up to artifact synergy decks that would not care about Trial of Ambition