Prior to Duress the discard effects in black were either over powered RNG hell like Mind Twist and Hymn to Tourach or pretty low powered
OUT: Fellwar Stone IN: Mirage Mirror Were a three-color deck, so the odds that Fellwar Stone wont be able to tap for at least one of our colors is pretty slim
In the Deep Clue Sea commander deck, you'll find that water is no impediment to a thorough investigation, and a single clue can bust a case wide open
This kind of slow, grindy payoff can be outclassed in the modern Commander landscape, but creating copies of Archon of Cruelty and Agent of Treachery each turn is a tantalizing enough reward to try anyway
Soul Manipulation , Shadow of Doubt , and Muddle the Mixture are all counterspells that can do something else when a counterspell isn't warranted
These little tokens are pretty powerful and can help enable tons of different strategies