I know the use of X is a red flag for commons.
While a red flag, that does not mean it cannot happen. My reasonings were as follow.
1.The ability itself is slow enough that it should not be of much relevance. Unless this is being played against onedrop.dec, the ability won't go off too often. This will lead into the next point. 2.Low-power. In all liklihoods, this could hit a single, larger target and bounce back a somewhat or frequent small targets for a little life that could be inconsistent. As for the body's stats, they're pretty weak.

For those reasons, I think a more obvious template would be "T, Remove any number of lore counters from ~: Return target creature card with mana value X from your graveyard to your hand and you gain X life, where X is the number of counters removed this way." You're fighting for text space though with that reminder text

I think it's suboptimal to use the same counter type as sagas. They errataed a handful of older cards to stop using lore counters for that reason

It looks like Mindunbound, Scrolls of the Masters, and Myth Realized still use Lore counters. While counter space isn't particularly limited, I didn't want to throw out a new counter type that didn't do anything itself while wanting a name more flavorful than "charge." If I do change the counter name type, I'll go with wisdom counter.