Windrider Wizard
Creature — Human Wizard
Flying
Whenever you cast an instant, sorcery, or Wizard spell, you may draw a card. If you do, discard a card.
"It's an ideal method for exploring sky ruins. The drakes sniff me briefly but then lose interest."
Illustrated by
Commander Masters#134CommonEnglishLegality
Rulings
You draw a card and discard a card while Windrider Wizard’s last ability is resolving. No player may take actions between those events, and nothing can happen.
An ability that triggers when a player casts a spell resolves before the spell that caused it to trigger, but after targets have been chosen for that spell (if it has any targets). The ability resolves even if that spell is countered.
A Wizard spell is one with the creature type Wizard. Spells that are Wizard-themed (such as Relic Amulet) aren’t Wizard spells.