Maid's Downtime
You can use this Skill's second and third effects once per Duel if your Deck (excluding the Extra Deck) contains 8 or more different EARTH/ WATER/ FIRE/ WIND "Dragonmaid" monsters.
1: You cannot Normal or Special Summon monsters with a Level, except for "Dragonmaid" monsters.
2: Send 1 Dragon monster from your hand to the Graveyard, then add 1 "Dragonmaid" monster from your Deck to your hand.
3: If only your opponent controls a card, Set 1 "Dragonmaid" Downtime from your hand, Deck, or Graveyard. (This card can be activated the same turn.)
Other Source
Skill Trader