Aphelios, Weapon of the faith

[LEVEL 2], First strike
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.
Whenever you cast your second spell each turn
and at the beginning of your upkeep, conjure the Phased card from aphelios's spellbook in hand.
Spells conjured this way cost {1} less to cast.