SpiteAndMalice wrote:A) In a classic chaos mode game of chaos, what is the minimum number of turns required in order to cast your first mega spell?
The bulk of the mega-spells cost between 55-65 mana, with neutral spells at the low end (55) and law and chaos spells towards the high end (65), undead are always at the high end. Most megas cost either 55 or 65 exactly, with a few exceptions in between, costing around 58 or 61.
There are two other exceptions.. Dragons actually cost 68 which is the highest (this partly answers part B of the question!) and Rat swarm is the lowest at 48.
If we take 55 as being the predominant lowest mega-spell cost range then I guess it can be ready to go as soon as you grab a sprite, which can be turn 1 on some maps right? so if the sprite grab is on for turn one, then the mega-spell cast is a possibility on turn one.
It would require burning your deck (a max of 36 mana is available) which would leave you with between 14-17 cards left - depending on how much you chose to boost the mega.. In the case of a turn two sprite grab your mana level could contain some fail mana or kill mana that you may have already earned.
It's not really practical to waste that much mana and that many spell cards on casting a mega-spell that early.
SpiteAndMalice wrote:B) Which mega spell has the highest casting cost; and what is the minimum number of turns then?
I guess the highest cost mega-spells that are in the 65+ region would take an extra turn or two to gain enough mana for. 65+ mana on turn one may not be mathematically possible (in the same way that 55 mana on turn one is possible), but 65+ mana is still do-able on turn two.
I guess theoretically all mega-spells are cast-able on turn two IF the sprite grab is definitely on for turn two and IF some extra mana has been gained from somewhere other than burning (one mana fail will do it).
Rat Swarm is the only mega you could cast on turn two without a sprite grab (a turn one hydra fail + deck burn could fund it instead), but it's wasteful when you consider you could just open with one or two standard rat packs for free (if you have them).