Basically, you need cards to banish other cards, then, Summon Gren Maju Da Eiza, for it to gain enormous amounts of Attack. Pot of Extravagance is very useful in this deck as you can banish 3 "Angel if Zera" then during the next Standby Phase, "Angel of Zera' gets ressurected.
NOTE: If you're playing in OCG, replace Pot of Extravegance with Fairy Tail Snow!