With the Doctor and their companions at your side, you should expect the unexpected
Koga works best with Weezing, which can deal damage through poisoning without any energy investment
Three mana is a good place to be for this kind of Planeswalker, but there are better three mana Planeswalkers to play these days
Kona, Rescue Beastie (DSK-358) - Duskmourn: House of Horror (Borderless) Kona, Rescue Beastie (DSK-358) - Duskmourn: House of Horror (Borderless) Wizards of the Coast This item is like new, pulled from a sealed pack
Electrodominance Targeted removal+ Speaking of free stuff, Electrodominance is an instant spell that costs X and two Red mana
205.3b Subtypes of each card type except plane are always single words and are listed after a long dash