Genesis Prism

{t}: The Next Spell the Mortal Casts has a
Converted Mana Cost of 0.
{t}: If the Planeswalker hasn't Drawn yet, they
may draw Mana from the Environment and
Convert it into any one Color.
A Planeswalker may Crush this Item,
Destroying it from their Brain and Choose any
Spell from any Non-Cheat Set, and
place it in their Brain.