Shibboleth, Mechanized Corpser

Indestructible, Trample

Superior Technology — When Shibboleth,
Mechanized Corpser attacks, it deals 2 damage to 1 creature or 1 to two creatures.
Trusted Companion — If Karn is on the battlefield, it mounts onto Shibboleth,
Mechanized Corpser combining them. (Once combined, you add the power and toughness and all abilties. They are now one card.)