Looking back, Chaos Orb is like the progenitor of later artifacts like Oblivion Stone, which can destroy other permanents in more conventional ways
While not quite as oppressive (since your opponent still gets to keep one card after you cast a Wheel of Fortune), it's still devastating
Does Paying Life Cause You to Lose Life
It also removes a Voltron or combo creature across the table for a rotation, and it can remove an entire board of blockers, granting you a free attack
As the name suggests, this event was intended to showcase the fresh, post-rotation Standard format
Yidris, Maelstrom Wielder gets out of hand very quickly, as it lets you start cascading early thanks to its low casting cost