Vadrik, Astral Archmage

Vadrik, Astral Archmage

Legendary Creature - Human Wizard | Power/Toughness: 1 / 2 (CMC 3)
If it's neither day nor night, it becomes day as Vadrik, Astral Archmage enters the battlefield.
Instant and sorcery spells you cast cost less to cast, where X is Vadrik's power.
Whenever day becomes night or night becomes day, put a +1/+1 counter on Vadrik.