Whenever Colossal Plow attacks, add {W}{W}{W} and you gain 3 life. Until end of turn, you don't lose this mana as steps and phases end. Crew 6 (Tap any number of creatures you control with total power 6 or more: This Vehicle becomes an artifact creature until end of turn.)

Oxen you control have double strike. Whenever Bruse Tarl, Roving Rancher enters the battlefield or attacks, exile the top card of your library. If it's a land card, create a 2/2 white Ox creature token. Otherwise, you may cast it until the end of your next turn.

Haste At the beginning of each player's end step, if no creatures attacked this turn, put a fury counter on Charging Cinderhorn. Then Charging Cinderhorn deals damage equal to the number of fury counters on it to that player.

Giant Ox crews Vehicles using its toughness rather than its power.

Flash Flying When Holy Cow enters the battlefield, you gain 2 life and scry 1. (Look at the top card of your library. You may put that card on the bottom.)

When Liberated Livestock dies, create a 1/1 white Cat creature token with lifelink, a 1/1 white Bird creature token with flying, and a 2/4 white Ox creature token. For each of those tokens, you may put an Aura card from your hand and/or graveyard onto the battlefield attached to it.

Landfall — Whenever a land enters the battlefield under your control, tap target creature an opponent controls.

Vigilance Ox Drover can't be blocked by Oxen. Whenever Ox Drover enters the battlefield or attacks, target opponent creates a 2/4 white Ox creature token and you draw a card.

When Ox of Agonas enters the battlefield, discard your hand, then draw three cards. Escape—{R}{R}, Exile eight other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.) Ox of Agonas escapes with a +1/+1 counter on it.

When Stoic Farmer enters the battlefield, search your library for a basic Plains card and reveal it. If an opponent controls more lands than you, put it onto the battlefield tapped. Otherwise put it into your hand. Then shuffle. Foretell {1}{W} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Changeling (This card is every creature type.) Whenever an opponent casts a spell, you may put a +1/+1 counter on Taurean Mauler.

Destroy target artifact or creature. Its controller creates a 2/2 white Ox creature token.

Exile target creature, then roll a d20. 1—9 | Its controller creates a 4/4 green Ox creature token. 10—19 | Its controller creates a 2/2 green Boar creature token. 20 | Its controller creates a 0/1 white Goat creature token.

Spree (Choose one or more additional costs.) + {1} — Untap all creatures target player controls. + {1} — Target creature gains double strike until end of turn.

({T}: Add {R}.)