Ragemonger

Minotaur spells you cast cost {B}{R} less to cast. This effect reduces only the amount of colored mana you pay. (For example, if you cast a Minotaur spell with mana cost {2}{R}, it costs {2} to cast.)

Messenger's Speed

Enchant creature
Enchanted creature has trample and haste.

Talruum Minotaur

Weapon Surge

Target creature you control gets +1/+0 and gains first strike until end of turn.
Overload {1}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Rageblood Shaman

Trample
Other Minotaur creatures you control get +1/+1 and have trample.

Mountain

Rakdos Guildgate

This land enters tapped.
{T}: Add {B} or {R}.

Kragma Warcaller

Minotaur creatures you control have haste.
Whenever a Minotaur you control attacks, it gets +2/+0 until end of turn.

Undead Minotaur

Minotaur Skullcleaver

Haste
When this creature enters, it gets +2/+0 until end of turn.

Swamp

Hostile Minotaur

Haste (This creature can attack and {T} as soon as it comes under your control.)

Mogis, God of Slaughter

Indestructible
As long as your devotion to black and red is less than seven, Mogis isn't a creature.
At the beginning of each opponent's upkeep, Mogis deals 2 damage to that player unless they sacrifice a creature of their choice.

Temple of Malice

This land enters tapped.
When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
{T}: Add {B} or {R}.

Felhide Spiritbinder

Inspired — Whenever this creature becomes untapped, you may pay {1}{R}. If you do, create a token that's a copy of another target creature, except it's an enchantment in addition to its other types. It gains haste. Exile it at the beginning of the next end step.

Felhide Minotaur

Oracle of Bones

Haste
Tribute 2 (As this creature enters, an opponent of your choice may put two +1/+1 counters on it.)
When this creature enters, if tribute wasn't paid, you may cast an instant or sorcery spell from your hand without paying its mana cost.

Felhide Petrifier

Deathtouch
Other Minotaur creatures you control have deathtouch.

Flurry of Horns

Create two 2/3 red Minotaur creature tokens with haste.

Borderland Minotaur

Deviant Glee

Enchant creature
Enchanted creature gets +2/+1 and has "{R}: This creature gains trample until end of turn."

Kragma Butcher

Inspired — Whenever this creature becomes untapped, it gets +2/+0 until end of turn.

Fanatic of Mogis

When this creature enters, it deals damage to each opponent equal to your devotion to red. (Each {R} in the mana costs of permanents you control counts toward your devotion to red.)