Core Set 2020 · M20 · common
Instant
wotc · 2019-07-12
The size of the bonus is determined as Growth Cycle begins to resolve; it won’t change later in the turn if the number of Growth Cycles in your graveyard changes.
wotc · 2019-07-12
Because Growth Cycle is still on the stack as you perform its instructions, it isn’t in your graveyard and won’t add to the bonus the creature gets.