Malkzar of the Brilliant Light

Whenever you cast an instant or sorcery spell
with converted mana cost 4 or less, you may search your library for an instant or sorcery card with converted mana cost less than or equal that spell's and put it into your hand. If you do, shuffle your library.
The mentor and inspiration for hundreds of mages, he continues in his eternal quest for new knowledge and new ways to burn people to death.