Thalion, the Windwhisperer

Whenever an artifact spell enters your battlefield, scry 1.

When you control 3 or more Keystone Artifacts, Thalion gets +1/+1 for each Keystone Artifact you contol.
When you control 5 or more Keystone Artifacts, Thalion has Indestructible and Hexproof.

{u}{w}, {t}: Search your library for a non-creature artifact, reveal it, put it into your hand and shuffle.
{w/u}{2}: Target artifact becomes a Keystone Artifact Creature and it gains "This creature gets +1/+1 for each artifact you control" and ke