Seal in Time

Choose target creature and put 7 time counters on it. It can't be removed from play until the last time counter is removed from it. Each upkeep, remove a time counter
from that creature. When the last time counter is removed from that creature, exile it and create Adult Link, a 5/5 green and white creature token with {x}{g/w}: Put X +1/+1 counters on this creature