This would greatly benefit MTGO and definitely there are many decks that could be more played online and are too problematic to manage without having the ability, present in tabletop, to shortcut these loops.
Pauper would greatly benefit from the following cards:
Rust
Remove Enchantment
The first one is probably the one with the most potential in the current metagame. It did see play in tabletop, as it is a good way to address graveyard hate from cards like Nihil Spellbomb and Relic of Progenitus...