Lorcana Rise of the Floodborn emerald cards Bucky, Squirrel Squeak Tutor Prince John, Greediest Of All Belle, Hidden Archer Lucifer, Cunning Cat Pete, Bad Guy Dr
The cards' concept was that they essentially used energy to change the color of a spell being cast or a permanent in play with the concept being that players could do something like playing Thoughtlace on an opponent's spell to turn it blue so they can counter it with a Red Elemental Blast, or do a surprise change of color to a permanent for "protection from" purposes
If you dont do this, you get a 1/1 Goblin token
Of course, applying extra effort to Magic won't leave you tapped down for an extra turn
Saga even offers lifegain from Shadowspear, and additional Urza's Sagas via Expedition Map
Felix Five-Boots This commander just oozes potential