u/ElizabethWantsDeath

hey guys, im completely new to sorcery and saw spellcaster and just wanted some clarification on a few things.
1: when a spellcaster casts a spell is that considered "you" casting the spell or is it solely the spellcaster (avatar affects)
2: do spellcasters use the same source of mana as the player? or do they use a different pool (and double your mana?)
thanks