Primula the Rikka Fairy (SESL-EN015) [Secret Slayers]

If a monster you control is Tributed (except during the Damage Step): You can Special Summon this card from your hand in Defense Position. You can target up to 2 Plant monsters you control; increase their Level(s) by 2 until the end of this turn. You can only use each effect of "Primula the Rikka Fairy" once per turn.