It's literally a rhinoceros train that's gone off the rails
Ghalta and Mavren is an exception because it combines the abilities of both legendary creatures
Lets get to it, starting with one of the most degenerate sets of all time: Urzas Saga Significant cards on the list: Argothian Wurm $3 Gaeas Cradle $70 Gilded Drake $30 Karn, Silver Golem $4 Lifeline $4 Lightning Dragon $3 Morphling $10 Serras Sanctum $20 Tolarian Academy $25 Temporal Aperture $2 Time Spiral $25 Yawgmoths Will $15 Of these, only three can fairly be called tournament staples: Gilded Drake, Serras Sanctum, and Time Spiral
You can have four of the same card, which means you could have 24 Amber Madrigals in your deck
It also has a much smaller footprint, since an elastic band uses up much less space than a deck box
As the game goes on, more and more Crusades hit the table, making guys like White Knight into potentially 6/6 first-striking monstrosities