First of all, it can counter any type of spell, making it wonderfully flexible in Legacy and Vintage
This is one of the most straight-forward Doctor and companion pairings in the decks: Yaz exiles cards, The Thirteenth Doctor puts counters on stuff for playing that exiled card, and then untaps all your creatures with counters on to help them swing in
However, in terms of value per card, this is among the highest value sets in Pokemon history
In the photo above, both Aurora cards and the item Magic Golden Flower can be inked. Because Fire the Cannons! is a plain hexagon, it cannot be inked
A 2 mana 1/1 isn't exciting but when it holds off their 2/1 or wastes their turn as they are not going to Terminate it and then suddenly grows or taps to draw cards then it is all good
Transform Sideboards The most interesting thing about sideboarding is that it's done in secret