Doom Guardian

Defender, Reach, Can't be countered
When a creature you don't control Doom Guardian must block, if a creature destroys this creature, Doom Guardian deals 10 damage to all non-myr creatures and players that don't control myrs.
"I am ready to serve and support 40410-44, error system not found.....rebooting. Hello I am Doom Guardian pro-trector of 40410-44, system found.....pre-paring defense mode."