Most commons end up in this range, and Limited decks are often made up of these
Serving in the Memorial Navy was nothing like the posters made it out to be
These are modal instants that have a flexible mana cost
Admittedly, Junbo Cactuar will require some additional help, such as Haste or a Fling effect
I know the format has changed heavily since 2014-2015, but there are still plenty of control-defeating monsters out there that cost exactly two mana
It also had the advantage of being more elegant than its mirror card Undermine, as it was a simple combination of Healing Salve and Counterspell for the combined price of both of them, and while the strength of the colors meant the ranking here goes the other way, Absorb shows how it's more important to get what you need rather than what is technically more valuable