Duskmourn: House of Horror Commander

Land

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {G} or {U}.

Thornwood Falls

March of the Machine

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {R} or {W}.

Wind-Scarred Crag

Dominaria United

Dragon

Rith, Liberated Primeval

Legendary Creature — Dragon

Flying, ward {2}
Other Dragons you control have ward {2}.
At the beginning of your end step, if a creature or planeswalker an opponent controlled was dealt excess damage this turn, create a 4/4 red Dragon creature token with flying.

Goblin

Rulik Mons, Warren Chief

Legendary Creature — Goblin

Menace (This creature can't be blocked except by two or more creatures.)
Whenever Rulik Mons attacks, look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If you didn't put a card onto the battlefield this way, create a 1/1 red Goblin creature token.

Zendikar Rising

Creature — Ox

Landfall — Whenever a land you control enters, tap target creature an opponent controls.

Makindi Ox

Copy

Insect

Creature — Insect

Landfall — Whenever a land you control enters, create a 1/1 green Insect creature token. If you control six or more lands, create a token that's a copy of this creature instead.

Scute Swarm

Creature — Elemental

Haste
This creature can't be blocked by creatures with power 2 or less.
Landfall — Whenever a land you control enters, this creature gets +2/+2 until end of turn.