Channel

You gather mana from your life force and channel it into powerful spells. Select an amount of hit die equal to the total levels of spells you are trying to cast. If you have the amount of hit die, you lose the hit die. If its above the amount of hit die you have, you lose all hit die. Then roll and pay an amount of life equal to your hit die times the level of spells. Until the start of your next turn, you are surrounded by green mist while alive that any spellcasters can perceve as a danergous spell. It is very reasonable for all creatures around you to attack you. If you are concious/alive at the start of your next turn, as your action, you may cast a spell you know of the level you paid hit die.

At Higher Levels. When you cast this spell at a spell slot of three or higher, you may cast up to one more spell for each higher level above 2. The total levels of spells cast this way must still be equal to the amount of hit die paid.

Bonus Combo: Typicly cast with Fireball as its a third level spell that can be cast at higher then third level.