Combos Utilizing Moat

once you have moat out, you can force your opponents to attack with one of their creatures and they will die. if moat isnt out yet, the royal provides you some time

Moat makes it so creatures without flying can not attack and levitation make all creatures you control flying

creatures lose flying and non-flyers can't attack.

you put down the alley grifters and then cast moat on it, if the enemy blocks it then your opponent has to discard a card, eventually the other player will die or you will be able to put down the AoW

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Pull out Moat then Gravity Sphere to leave your Opponents and yours useless then use Disentegrate to wipe out your opponent

this combo is practically useless, you don´t want to play it in any situation unless you have no brains

make a bunch of flying tokens that ignore the moat. a great kill mechanism for mono-white control decks.