Ego Erasure
Lorwyn — uncommon
Tribal Instant — Shapeshifter
Ego Erasure rulings:
2013-07-01: Examples of creature types include Sliver, Goblin, and Soldier. Creature types appear after the dash on the type line of creatures.
2007-10-01: If a creature loses all creature types but then gains a new creature type later in the turn, it will be that new creature type.