I haven't been able to piece together which card this replaced.

I also still don't like using "basic lands" as Discovery support, as that is the space with the least room for lands with different names (literally just 5, while in contrast, non-basics or lands in general, provides near infinite possibilities) and requires you to be playing multicolor to work.

It didnt replace a card as such, Sting should have been taking up a creature slot so I moved it there which opened up a sorcery slot. The card which left the skeleton was Unbound Explorer as I'm pretty against those types of effects in a set where a decent chunk of the creatures you want to untap already untap themselves.

I could agree with that but if we're going to have spells that search the library for lands at common then they're going to have to get basic lands. There is also nothing wrong with having ramp in a lands matter set. If its really that much of a problem then this card does double up as a +1/+1 counter card for that archetype.

Ah I see what you did yea.

I do like that this fits the +1/+1 counter archetype. And I realize that the majority of the time, common only gets to search for basic lands. My concern is more that caring about basic lands, as Discovery support, is weak because Discovery benefits much more from nonbasics.

Yeah I can see what you're saying. This could probably be just and always put a +1/+1 counter on a creature since I dont think either effect is worth a full mana. Might push it a bit but I dont think its over the top. Right now its kind of lackluster and you dont want to play it as much on curve just to get the land.

A ramp spell that you cannot cast turn two if you haven't played a creature turn 1? What?

EDIT: Also this spell is rather unattractive with basic landcycling already a major mechanic.

Should likely be replaced with a more straightforward +1/+1 counter enabler.