Soul Fighter Samira

On your turn, whenever a creature an opponent controls is dealt damage, put an experience counter on Samira. Experience counters cannot added to Samira in other ways. Remove all experience from Samira at the end your turn.

Samira has the following abilities according to the amount of experience counters she has:
1: Samira gains Prowess, 2: Samira gains Haste,
3: Samira gains Double Strike, 4: Samira gains Vigilance 5: Samira becomes Unblockable.
6: Samira gains: {t} Destroy target creature.