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By gaining the activated ability of Tree of Perdition, it can set your opponent's life total to 2 on turn four, adding redundancy to this game-winning combo

In the land of commons, though, I think this one's best as a rare sideboard option or Tron one-of and not much else

Chronicler of Worship also exists for Arena players

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Cost reduction encourages playing bundles of spells in a manner that Storm decks in particular can use

If the creature with offspring leaves the battlefield before the triggered ability resolves (presumably to go play on another battlefield somewhere), you'll still create the token