Karkat, Honored Lieutenant

Whenever Karkat, Honored Lieutenant attacks,
you gain life equal to the number of attacking creatures.
Whenever Karkat, Honored Lieutenant blocks, it
deals damage equal to the number of blocking
creatures to target creature or planeswalker.
"We live in a city that despises its citizens, full of
guilds that damn their members. Tell me why YOU
wouldn't be furious enough to join the Boros."