mtg on your turn card Tactical Protocol: Opponent's Why is it so common

In addition to the four factions previously introduced, The Lost Caverns of Ixalan introduces three additional groups

Promise of Loyalty

Our proxy can be used for kitchen table magic, a proxy for deck testing, and act as additional copies of those expensive cards that you already own, players who looking for alter art of a card that they like or to use as their Commander, cube, EDH / CEDH games with friends who welcome proxies

It works great with the 8-cost Gecko Moria, and it quickly became one of the strongest combo plays in the game

As such, even though the rares and mythics are strong, a weak set of foil uncommons means that the value the foil slot adds to a box of Rivals of Ixalan is only $0.20 higher than it was back in Ixalan