all borderless mtg cards Endurance (Borderless) [Modern Horizons 3 Special Guests] then discard a card Relentless Rats | Special Guests

Its got Trample, which is a neat way to cause some damage, but its the second part of its abilities that will cause the most impact

Number 315 Language English Legal Formats Commander, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Pauper, Pioneer, Standard, Timeless Rulings (10/1/2007) The second ability checks how many creatures have been exiled with Colfenor's Urn over the course of the entire game

"Lifetime" Pass Holder "Rumors of My Death

Amber/Emerald, on the other hand, doesnt require particular combos in order to be used effectively, as most cards work well on their own