Lotus Cobra

Landfall — Whenever a land enters the battlefield under your control, add one mana of any color.

Coiling Oracle

When Coiling Oracle enters the battlefield, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.

Ambush Viper

Winding Constrictor

If one or more counters would be put on an artifact or creature you control, that many plus one of each of those kinds of counters are put on that permanent instead.
If you would get one or more counters, you get that many plus one of each of those kinds of counters instead.

Lorescale Coatl

Whenever you draw a card, put a +1/+1 counter on Lorescale Coatl.