Pointed Discussion

Don't look like a delta.

Good with Power Conduit

Great card for your opponent to see come into play.

Strictly worse than Waterveil Cavern. Less playable than Frost Marsh because Frost Marsh can be ramped into with Into the North. And there's that whole snow mana thing.

@DacenOctavio: Not at all strictly worse than Waterveil Cavern. As FragnutMK1 mentioned (more than a year before your comment), you can remove counters from this in a few ways, most notably Power Conduit, allowing it to be used for colored mana every turn.