Corsiva, of Mirror's End

Protection from reflected spells and permanents.

{x}{c}: Reflect target spell with mana value X. If this targets a creature spell, it enters reflected. (Reflected permanents have their base power and toughness
switched, and have changes to power and toughness
they provide switched.)

Whenever a reflected permanent enters under your control, draw a card and put a +1/+1 counter on
Corsiva.