Jace's Erasure

Whenever you cast a blue spell, target player mills two cards.

Whenever you cast a historic spell, target player mills two cards. (Artifacts, legendaries, and Sagas are historic.)

Whenever another snow permanent you control enters, you may have target player mill two cards.

Whenever a player casts a blue spell, you may pay . If you do, target player mills two cards.

All Slivers have ": Target player mills a card."

Whenever a player casts a spell, that player may pay . If the player does, they draw a card.