Kraken's Eye
Magic 2010 — uncommon
Artifact
Kraken's Eye rulings:
2009-10-01: The ability triggers whenever any player, not just you, casts a blue spell.
2009-10-01: If a player casts a blue spell, Kraken’s Eye’s ability triggers and is put on the stack on top of that spell. Kraken’s Eye’s ability will resolve (causing you to gain 1 life) before the spell does.