In other words, proliferate takes a more proactive role in +1/+1 counter decks, and a more controlling roll in -1/-1 counter decks
Cyclonic Rift and Torment of Hailfire are great targets since they both only cost two mana normally
If a spell on the stack has split second while you control Teferi, you can't suspend creature cards since split second stops you from casting them, even though suspending them is a special action
The Earth Crystal and [[The Darkness Crystal]] are the standouts
Eldrazi Incursion - Modern Horizons 3 An Eldrazi deck with five colors and a Commander that can copy spells and activated abilities for two generic mana, Eldrazi Incursion is great off the bat, but becomes positively vile with the right upgrades
Still, serious collectors arent always deterred