Tasia, the Wandering Storm

Tasia, the Wandering Storm costs {1} less to cast
for each instant or sorcery you cast this turn.
Whenever you cast an enchantment, instant, or sorcery, roll a d20.
•on a 9 or lower: each player loses 1 life
•on a 10 - 19: you draw 1 card, and each
opponent loses 2 life
•on a 20: draw 1 card, and search your library
for a card, and put it in your hand.