Eyes of the Watcher

Whenever you cast an instant or sorcery spell, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")

Whenever you cast an instant spell, you may pay . If you do, draw a card.

Instant and sorcery spells you cast cost less to cast.

Whenever you cast an instant or sorcery spell, scry 1.

Flying

Whenever you cast an instant, sorcery, or Wizard spell, you may draw a card. If you do, discard a card.

Magecraft — Whenever you cast or copy an instant or sorcery spell, draw a card.

Instant and sorcery spells you cast cost less to cast.

To solve — You've cast four or more instant and sorcery spells this turn. (If unsolved, solve at the beginning of your end step.)

Solved — Whenever you cast an instant or sorcery spell, draw a card.