Teferi's Protection While ultimately a defensive spell, if you want to talk about cards that are quite definitionally game changing, this is one of them
If a player casts a card "without paying its mana cost," they can't choose to cast it for any alternative costs, such as emerge costs
Putting those two assumptions together, it is safe to conclude that the price of Blue Ugin would unlikely drop any lower than set foil Ugin, which is currently at $97, even in the scenario where Blue Ugin is reprinted as a judge foil, based on the merit that Blue Ugins are scarcer
Bright-Palm, Soul Awakener and Conclave Sledge Captain are good +1/+1 counter support cards, which is technically true of the backup mechanic as a whole
(The copy becomes a token.) Legendary Creature Artifact - Robot Commander (CTRL to add secondary) 01 Max Speed