Oppression doesn't counter the spell in any way, it only applies a tax to the cost of it
It's good in Boros decks but it's also great against those decks, which is an excellent place to be
Magus of the Wheel Wheel effects are useful, whether you benefit yourself with the card draw, or punish opponents for drawing and/or discarding
Best accomplished in the blue-red multi-Room deck, this can win you the game on your upkeep if you control eight or more unlocked doors
If you visit Ferris Wheel and there are no legal targets to choose, the ability is removed from the stack and has no effect
Going by common creatures, this is enough to remove everything except for Balamb T-Rexaur, Iron Giant, and a Gigantoad with 7+ lands out