Althen, Runemaster

Impede (When Althen, Runemaster enters the battlefield, choose a target creature. Prevent all damage
that would be dealt by that creature to any target
except Althen, Runemaster until Althen, Runemaster leaves the battlefield.)
Prowess
If you control one or more creatures that share
exactly one color with Althen, Runemaster each
of those creatures and Althen, Runemaster gain
"{w/u}{w/u}: Exile this creature, then return it to the battlefield under its owner's control."