Each copy of Esper Terra created by itself is a 6/6 Flier with Haste, and you can repeat the loop as many times as you want
The deck didnt even run any other Clerics a lot of the timegetting multiple Rotlungs out was enough
Charizard's damage is also impressive, making it a great offensive unit too
The obvious way to use this legendary blue planeswalker is to plot spells until you can activate Jaces -6 loyalty ability, then have a huge turn when you cast everything and copy all your spells
All of the on-color Lieges (Balefire Liege, Boartusk Liege, Wilt-Leaf Liege) from Shadowmoor add tons of power to the board, and you can put all that power to good use with Blade Historian giving your team double strike
Some of it will be due to condition available on the market, granted, but I cant explain why Island of Wak-Wak is this much