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At the beginning of your upkeep, scry 1.
Whenever you cast a creature spell, you may pay {G}. If you do, draw a card.
Lifecrafter's Bestiary's second triggered ability resolves before the spell that caused it to trigger. The ability will resolve even if that spell is countered.
The draw step is after the upkeep step, so you'll scry 1 before you draw for the turn.
While resolving Lifecrafter's Bestiary's second triggered ability, you can't pay {G} multiple times to draw multiple cards.
