Glaze Fiend is a 2-drop that buffs itself until end of turn when other artifacts enter the battlefield for you
It exceeds Kingdra's value by over $100, though that should come as no surprise considering the vastly different popularity tiers each Pokemon sits in
A big one I'm missing is the Venusaur #13
I have fewer explosive starts, because I'm more likely to draw a 4-mana version of a spell with an Activated Ability I can use later than the 2-mana version which would leap me ahead if I got lucky
For example, if your 6-mana Rhythm gets a 4/4, you can cast Rhythm for X=6 minimum the following turn thanks to harmonize
Examples of these cards include the Bobblehead series from Magics Starting with the Bobbleheads, these Commander favorites may not be the most powerful of cards or the rarest they were printed out of 500, after all but they do highlight the power of cutting down on the absolute number of serialized cards per set