1) Play Morgana's Grimoire ASAP
2) When able to, play Runestorm.
3) Use the Grimoire twice... and wait, do not use any runes (unless absolutely necessary)
4) Use mana unlocks to get to 9 ASAP
5) Drop the Avatar of Magic and cast all your 0 cost runes/spells and get a plethora of Blasts at 1
6) Use the Grimoire one last time
7) cast all your 0 cost Blasts and win