Cilas, Spy of the Shadows

{t} - Add 1 tier to Cilas, Spy of the Shadows.
{u/b}{u/b} - Untap Cilas, Spy of the Shadows.
Each tier adds a +1/+1 counter to Cilas,
Spy of the Shadows. After tier 5, resets all
tiers and creates a 3/4 soldier token with
invincibility.