Rydia [Crystal Dominion]

If Rydia is dealt damage by your opponent's Summons or abilities, the damage becomes 0 instead.
When Rydia or a Catagory IV Character enters your field, place 2 Growth Counters on Rydia.
0: Cast 1 Summon of cost equal to or less than the number of Growth Counters placed on Rydia from your hand without paying the cost. You can only use this ability once per turn.