Punishment can come in the form of damage or loss of another resource, or that might mean you benefit from their extra draws in some way
Boromir, Warden of the Tower Im usually not a fan of commanders that want to sacrifice themselves, but Boromir, Warden of the Tower has an important ability that automatically counters (a white counter?!) some decks' entire strategy
Although you somewhat two for one yourself by using this, when they get round to using the clue they ensure you have gained a mana advantage
Have Trenzalore Clocktower and Midnight Clock for more card draw as both let you draw seven cards when they get 12 time counters on them
Yes, much of that excitement comes from Pioneer, where Kaheera is a card that Cat Tribal is BEGGING for and probably makes the kitties a very good tribe in that format
Firkraag will infuriate opponents, goading their creatures, and helps you to keep your hand topped up too