Well for starters you can nix either the Desperate Ritual or the Pyretic Ritual. As Grinning Ignus + Birgi = infinite storm count by themselves. And the mana created by the Ignus results in when you are ready to Grapeshot. The extra mana generated by Desperate Ritual at the end is just gonna be unspent .Quote from ThyLordQ »Quote from Manjome Thunder »Grinning Ignus, Birgi, God of Boasts, Grapeshot. Hypothetically you can do it as soon as turn 4 without any extra mana.
Oh, I know you can do it by turn four with no fast mana, I was thinking in terms of Turn 1 kills.
With your original combo if you swapped out the Grinning Ignus and Grapeshot for a Goblin Charbelcher. ( from Mountain and from Spirit Guide to make , spend that for a Ritual to make with an extra from Birgi. Spend of the four to cast second ritual to now have 6 , cast charbelcher, this is another for a total of 7 which gives you enough to cast it and activate it once.)
Hopefully that helps