Kletharuk Sentry

Vigilance
Kletharuk Sentry can block an additional creature each combat. Whenever it does, chamber 3. (Exile the bottom 3 cards of your library to the sanctum. Any player can cast
spells and play lands in the sanctum.)
{1}{w}: Kletharuk Sentry gets +0/+2 and
gains defender until end of turn.