red card mtg A Whole New World: After Rotation – Innistrad Block Cards Create two 3/1 red Elemental creature tokens with trample and haste Top Mono-Red Cards | EDHREC

People used it to print mana basically, which got it banned

On top of that, its one of the few planeswalkers that can actually be your commander, and its cheap to cast, only costing 3 mana, which is great to deploy early and start getting value from it and permanents

None of the tapping requires mana or tapping her, so you can do them on arrival to the battlefield and as many times as you have untapped stuff

1 Cave of Temptation

Speaking about the boosters was the lead designer, Gavin Verhey, who stated that, [Mystery Boosters] are probably the strangest non-silver bordered thing weve ever done. The Mystery Booster series curated list contains over 1,000, making it easily the largest set ever. The unconventional packs each follow the same basic structure, featuring: 1 playtest card (only in the Convention Edition) 2 commons/uncommons of each color 1 common/uncommon multicolored card 1 common/uncommon artifact or land 1 pre-M15 card in Magics original frame (can be a rare) 1 rare or mythic from M15 forward The playtest cards are perhaps the most interesting pieces in each pack