Terrible jokes aside, the ceiling on the 0 activated ability is immense, especially if you can work out something with Displacer Kitten or The Chain Veil to add a bunch of mana from Chandra in the same turn
Would it one of the many gorgeous, full-body paintings of Planeswalkers that shes done, or perhaps the stained-glass Basic Lands from Dominaria United
Creatures you control get +X/+0 until end of turn, where X is that card's mana value
This Amber and Emerald starter deck focused a lot on the Dalmatian puppies , which also included a new way to play, by allowing a player to have up to 99 copies of the tail wagger cards in one single deck though, the starter deck did not do that, thankfully
Two extra lore per turn is more valuable than you might think
It still meets all the criteria