Some players love the mechanic as others hate it
Cards tied to prizes, contests, and promotional events tend to be the scarcest, because they were never meant for mass distribution in the first place
Tegwyll, Duke of Splendor Form an alliance with Tegwyll to enhance your Faerie forces and replenish their numbers with card draw
Dovin, Grand Arbiter I feel obligated to talk about planeswalkers because they're flashy and the faces of the set, even when most of them are garbage for Commander
Rounding off the list of life gain tricks, I would consider a few of the Extort creatures, like Pontiff of Blight, Vizkopa Confessor, or even Syndic of Tithes, to help syphon life points from the rest of the table with every spell you cast