Rushed Rebirth
Instant
Choose target creature. When that creature dies this turn, search your library for a creature card with lesser mana value, put it onto the battlefield tapped, then shuffle.
Jason Kang
Magic Online Promos (PRM)
• #90192Rulings
If you choose a creature or search for a creature card with {X} in its mana cost, X is considered to be 0.
(wotc • 2021-04-16)
Rulings
If you choose a creature or search for a creature card with {X} in its mana cost, X is considered to be 0.
(wotc • 2021-04-16)