This can come in the form of incidental damage (Sabotender), threat of activation (i.e., an aggro deck that can use Paladin's Arms to trade up its creatures over time), or snowballing incremental advantages from archetype payoffs
Chittering Harvester Significant value for the five mana, most of the time getting a three-for-nothing
And they are at their most magical as the first Iconic cards in Disney Lorcana
Of course the late-game bomb is Spine of Ish Sah, which enters the battlefield and destroys a permanent
Even beyond the combos, Bartolom del Presidio becomes a ferocious threat quite quickly, especially considering its mana cost
Turning scry into +1/+1 counters sounds interesting and I can think of a bunch of nonlegendary cards outside of the LoTR card pool that love having +1/+1 counters put on them