It serves as a (very) minor combat trick, and a way to convert a creatures power into +1/+1 counters on another creature if the first one dies
Heliod, the Radiant Dawn / Heliod, the Warped Eclipse Heliod, the Radiant Dawn brings enchantments back from your graveyard and sets you up for a flip into Heliod, the Warped Eclipse, a flash-speed Phyrexian god who discounts your spells based on how many cards your opponents have drawn
Hajar is a way to play Legendary-matters in Gruul, which has, until recently, not had a Commander to tie it together
Borderless Earth Crystal (68k, $11/$13) All of the Crystals have decent-to-good inclusion rates, but the Earth Crystal does something that is a little too supported in Commander, and that is the +1/+1 counter theme
not only does this card call to a significant time in her character development, it also reflects her mechanical power as a card