Mind Games fit this bill perfectly, allowing for the next best things to an Icy Manipulator
Once per turn, when creatures with counters on them deal combat damage to a player, the player who controls Tidus can draw a card and proliferate (i.e., add an extra counter to creatures and permanents that already have them)
As he stated on the official Magic: The Gathering website, hed actually designed a card game in 1982 called Five Magics, the design and mechanics of which were greatly inspired by tabletop games like Dungeons & Dragons and Cosmic Encounter
A heuristic I have found useful for identifying cards fundamental to the functioning of a deck is this: does your deck mulligan a high percentage of hands that do not contain this card or this class of cards
To argue for Sylvan Primordial's unbanning (and truly any card's unbanning) would be in support of the idea that Magic: The Gathering will always eventually self-correct itself
Sprite Dragon Sprite Dragon is the latest shot at enabling an archetype that has had a difficult time finding its footing in Modern