Aphelios, Weapon of the faith

Nightfall - When Aphelios enters the battlefield,
if it wasn't the first spell you cast this turn,
conjure a card from Aphelios's spellbook in hand.
When you cast your second spell each turn,
conjure the Phased card in Aphelios's spellbook
in hand if you haven't yet.
[LEVEL UP]: you have cast 4 cards from
Aphelios's spellbook.