Elensieriana, Fairy of Growth

Whenever a creature you control causes you to gain
at least one life, you get a Flower counter.
Nontoken creatures you control have
"Level up - Flower counter. Activate at split-second speed.
Level 2: Put a +2/+2 counter on this creature.
Level 3-5: Lifelink
Level 6-8: First Strike
Level 9: Put a shield counter on this creature.
Level 10: Create a token copy of this creature,
but back at level 0."