The reason we are careful with how often we do these cards is because they require players to pay attention to an area they normally do not have to
More lines on a card not only makes it harder to parse from a voting standpoint, but also frequently indicates a card is doing too much
I really like the idea of this being an ETB commander, leveraging Mikaeus and ways to remove counters to continually get enters triggers off cards like Ravenous Chupacabra and Phyrexian Rager
Buying all the Mythics and Rares from Jeskai Black will set you back more than buying all the Mythics and Rares from Caw Blade on June 1, 2011 (just after Batterskull and Sword of War and Peace were released in New Phyrexia and three weeks before the bannings)
Surge Conductor does it any time a nontoken artifact enters under your control, and the Peacemaker does it any time your opponent commits a crime
While some decks can become obsolete from one week to the next, they can also make a comeback after a ban, a reprint, or a powerful new card