See Challenge # 110.

I tried for ages to think of lands with a static ability, as mentioned in the challenge. It's hard to think of something which is relevant, and yet not too strong to appear on a land without an additional cost, and not too easy to forget is still active.

I remembered trying to make terrains as a subtype of lands, and finding the problem of having an effect that didn't make the land "not a land", and wondered if I could tackle to straight on, by finding an effect which is relevant, and yet is small enough it doesn't feel like it's the whole point of the card and is balanced on an ETBT land.

This came out of terrains with the rule of "you may attack through terrains/you must attack through at least one terrain", where the net effect is having effects which are partly under the attacker's control.

I'm not sure if this fits but it might. Crucially, no deck needs a specific answer to it, they can always answer it by playing more creatures.

Hmm. Not bad. Free reach against the opponent's least important flier. That's pretty good, because a lot of the time when there's a ground stall, one player can be pecking in the air with a couple of smallish fliers. This means whenever they do that they still lose one of them.

I mean, it's not broken or anything, because a single Spidersilk Net would do the same rather better. But it's still a nice effect to get on a land. Of course, you're paying mana-but-not-a-card for it (where Spidersilk Net charges you a card but not mana). Pretty strong, but probably not problematically so, since it's a fairly conditional situation where it'll be relevant.

Interesting. Goes a rather different, but very workable, direction with Terrains.