Depending on the format, you may not have the strongest counterspells for everything, but good ones for specific cards
How could you not love that effect
Excalibur, Sword of Eden is the dumbest thing printed since Mechtitan Core, and now the Mechtitan needs to swap out its frankly mid giant sword for Excalibur and games will surely be won from there, right
The mill caused by the attack trigger can turn into massive resource advantage though is likely to help an opposing deck or two, but any scries or top deck manipulation goes awry fast with Locke
Commander Decks Each powerfully preconstructed deck has 10 brand-new Commander focused cards
Two-thirds of all boosters are used this way, and yet we've always tuned booster packs for the other third