I LOVE stax gameplay, hatebears, and their brethren
Untapping Grim Monolith and Thran Dynamo, and occasionally even Mana Vault, it grants extra mana even the turn you put it into play and turns what was supposed to be a one time boost of mana into a bigger continuous boost of mana while having additional side uses untapping other things, with the traditional creature worth untapping being Phyrexian Colossus
Obviously, this can be very oppressive when your opponent is cracking a fetchland or casting something like Cultivate, but you usually wont use Opposition Agent to stop something like that
This is a removal spell I will play in every black-based control deck in Standard with confidence
The question is, will The Lost Caverns of Ixalan deliver in a similar manner
Includes 1 deck of 100 Magic cards (98 nonfoil cards and 2 Traditional Foil Legendary cards), a 2-card Collector Booster Sample Pack (contains 2 alt-border cards of rarity Rare or higher), 6 double-sided token cards, 1 deck box (can hold 100 sleeved cards), 1 strategy insert, and 1 reference card