General expend notes: Abilities that trigger whenever you "expend N" only trigger when you reach that specific amount of mana spent on casting spells that turn
This years printing of Aminatou, the Fateshifter took the core cards cards like Future Sight and Oracles Vault and added white and black, so I can do fun things like survive Duskmantle Seer longer than everybody else, get whatever I want out of Druidic Satchel, and break the symmetry of Zurs Weirding (since I dont need to draw cards)
The intent was presumably that a 1UUU Planeswalker with no built-in protection or other loyalty ability wouldnt be quite good enough in the era of Teferi, Hero of Dominaria, but it was a viable win condition in Standard Kethis Combo, arguably the best deck in Standard prior to the 2019 rotation
That ward cost may seem odd at first glance, until you realize that its ability is symmetric, meaning all of your creatures and your opponents' creatures become food
Likewise, Phage the Untouchable has an ability that makes any player who is dealt damage by this card lose the game outright
Thus, players must be like Eggman and pollute the situation to make it painful and harmful for everyone
