Jenova, Ancient Calamity
At the beginning of combat on your turn, put a number of +1/+1 counters equal to Jenova's power on up to one other target creature. That creature becomes a Mutant in addition to its other types. Whenever a Mutant you control dies during your turn, you draw cards equal to its power.
Buy from Cardmarket
Cardmarket prices from 2026-10-31
Official rulings (3) · Scryfall
If Jenova isn't on the battlefield at the time its first ability resolves, use Jenova's power as it last existed on the battlefield to determine how many counters to put on the target creature.
Use the power of the Mutant that died as it last existed on the battlefield to determine how many cards to draw with Jenova's last ability.
If Jenova dies at the same time as one or more Mutants you control, its last ability will trigger for each of those Mutants (including itself if it somehow became a mutant).