Does Rift Herald do more damage if your team has slain an earth dragon?

^ this is a very good question.

Urggg shyvana, im trying to kill towers after you summoned me but im dumby thicc and the clap of the plating that covers my eye is stopping the mountain drag you from buffing me.

I would like to know this answer too actually? This is a question I'd never considered. I guess it depends on if the the tool tip says Mountain Drag gives bonus true damage to turrets or if it gives champions bonus true damage to objectives. This is an important distinction because one implies that it just just for champions while the other implies that it is any allied creatures or champions.

That depends on what Rift Harold is considered, also on whether or not minions gain from Mountain.

If minions do, Rift does If Rift is considered a summoned pet like Tibbers, then also yes

Otherwise, probably not