Vespera, the Veilweaver

Whenever a player casts a noncreature spell, that player sacrifices a creature.
At the beginning of each player's upkeep, that
player discards a card unless they pay X, where X
is equal to the number of cards in their hand.
Whenever a player discards a card, you may draw
a card.
"In the tangled depths of the Aetherweald, Vespera weaves secrets into shadows, ensuring no truth remains undiscovered."