I cant decide that for you
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of The Water Crystal's first ability)
Focussing on sacrificing just about anyone and anything to achieve his goals, Sephiroth encourages you to keep sacrificing creatures to heal, deal damage, and draw, all to gain access to his incredibly powerful alternate form
Cyclonic Rift and Torment of Hailfire are great targets since they both only cost two mana normally
3 Sin, Spira's Punishment From FF10 Tidus' Nemesis Enters To Create Chaos And Generate Mana Sin is the antagonist of Final Fantasy 10, and he will threaten your battlefield just as much as he did the world of Spira