What do you think about this?
I would add this commands just for fun and I can think of something for every single unit.

!lycan -> The doggo, make sure it transform and it will do its job.
!warlock -> The sacrifice to make the other blood bound BIGGER.
!ogre -> Same as warlock, but is also a mage.
!sniper -> Has so much range that can hit other games, put him in a corner and he will kill for you.
!drow -> Useless by herself. Great to create a link for hunters and heartless.
!targetbuddy -> strong early because low units take longer to kill it, pretty useless late game.
!kotl -> completely useless until he charges his kamehameha and kills obliterates the enemy.
!slark -> the small fish, make sure he has enough time to charge up, and then just wait for him to kill everything.
!tide -> the big fish, can tank a little, almost useless at 1* but can stun everything if upgraded.
!slardar -> the fish, not good, not that bad, that is it.
!medusa -> squishy fishy, can do dmg and stun a lot of enemies.
!kunkka -> the pirate, he can summon a boat to stun enemies, he usually throws the boat on a single unit on the corner while the rest of the team is dying.
!cm -> completely harmless and has no hp, can give a LOT of mana to all allies.
!venom -> most OP 1 cost, his wards can do a LOT of damage, just make sure he will place a lot of wards and enjoy the early wins.