You can only use each effect of "Laundry Dragonmaid" once per turn
With up to 6 spell and trap zones (including the field spell), Mage Power can boost a monsters attack and defense by 3000
UR Ultra Rare Dragunity Oubliette X TRAP Counter When your opponent activates a Spell/Trap Card while you control a "Dragunity" Synchro Monster: Negate the activation, and if you do, banish that card, then if you control a Level 10 "Dragunity" monster, you can have 1 "Dragunity" monster you control gain 100 ATK for each face-up card that is currently banished
A 2/4 with lifelink is also nothing to sneeze at, making Mangaras slightly higher mana value a bit more palatable than itd be on a less relevant body
10,000 Mana There is a small subset of creatures that create mana equal to another creatures power
Searching out the Hexamage allows you to immediately turn the battle into Zilortha, Apex of Ikoria