Skilled Blue Magician

Ward {p/u}
Whenever a player casts an instant or sorcery,
put a Spell counter on this creature.
{u}{u}{u}; Remove three Spell counters and
sacrifice this creature: Put a 6 mana or less Fiend creature from your hand, graveyard, or library
onto your battlefield.(Activate only as a sorcery
and if you choose library, shuffle after.)