It does have a drawback, where Muk cannot use this ability if it is affected by a Special Condition, but it is an extremely powerful attack otherwise
UR Ultra Rare Chaos Grepher X LIGHT Level 4 [ WarriorEffect ] ATK 1700 DEF 1600 While face-up on the field, this card is also DARK-Attribute
But late game, at times, especially in Limited, you would be overjoyed to be able to draw a 3/3 for six mana
Labrynth Chandraglier Every castle needs furnitures: As Quick Effect, you can send it from the hand or field to the GY plus discard another card to set a Labrynth Spell/Trap from the hand or Deck
You can only use this effect of "Moulinglacia the Elemental Lord" once per turn
But, in a slower deck with good protection and ramp, it draws enough cards to overtake most opponents