Because you want: Readable prints (text and art you can actually see) Consistent results (so your deck doesnt look like it came from five different printers) A sane price (so you can test more ideas, not just one forever deck) If anything shows up off, tell us
Cards worth mentioning here are
Subsequently, its best to make sure youre up to speed with this MTG mechanic
Meanwhile, even though its technically NOT a reprint since its coming out in The Lost Caverns of Ixalan , but getting a copy of Brasss Tunnel Grinder is awesome
Some great support cards for flipping coins are Chance Encounter, Fiery Gambit, Tavern Scoundrel, and Krark's Thumb
The other main reason is that it stops your opponent from flashing in a creature or getting value out of their death triggers on cards like Heartfire Hero