
Iridescent Tiger | Creature | Cat | When this creature enters, if you cast it, add {W}{U}{B}{R}{G}. | Fajareka Setiawan

Dragonbroods' Relic | Artifact | | {T}, Tap an untapped creature you control: Add one mana of any color.
{3}{W}{U}{B}{R}{G}, Sacrifice this artifact: Create a 4/4 Dragon creature token named Reliquary Dragon that's all colors. It has flying, lifelink, and "When this token enters, it deals 3 damage to any target." Activate only as a sorcery. | Racrufi

Hardened Tactician | Creature | Human Warrior | {1}, Sacrifice a token: Draw a card. | Milivoj Ćeran

Marshal of the Lost | Creature | Orc Warrior | Deathtouch
Whenever you attack, target creature gets +X/+X until end of turn, where X is the number of attacking creatures. | Andreas Zafiratos

Bone-Cairn Butcher | Creature | Demon | Mobilize 2 (Whenever this creature attacks, create two tapped and attacking 1/1 red Warrior creature tokens. Sacrifice them at the beginning of the next end step.)
Attacking tokens you control have deathtouch. | David Palumbo

Defibrillating Current | Sorcery | | Defibrillating Current deals 4 damage to target creature or planeswalker and you gain 2 life. | Isis

Sonic Shrieker | Creature | Dragon | Flying
When this creature enters, it deals 2 damage to any target and you gain 2 life. If a player is dealt damage this way, they discard a card. | Jason A. Engle

Armament Dragon | Creature | Dragon | Flying
When this creature enters, distribute three +1/+1 counters among one, two, or three target creatures you control. | Maxime Minard

Kin-Tree Severance | Instant | | Exile target permanent with mana value 3 or greater. | Zack Stella

Skirmish Rhino | Creature | Rhino | Trample
When this creature enters, each opponent loses 2 life and you gain 2 life. | James Bousema

Abzan Monument | Artifact | | When this artifact enters, search your library for a basic Plains, Swamp, or Forest card, reveal it, put it into your hand, then shuffle.
{1}{W}{B}{G}, {T}, Sacrifice this artifact: Create an X/X white Spirit creature token, where X is the greatest toughness among creatures you control. Activate only as a sorcery. | Jorge Jacinto

Mardu Monument | Artifact | | When this artifact enters, search your library for a basic Mountain, Plains, or Swamp card, reveal it, put it into your hand, then shuffle.
{2}{R}{W}{B}, {T}, Sacrifice this artifact: Create three 1/1 red Warrior creature tokens. They gain menace and haste until end of turn. Activate only as a sorcery. (A creature with menace can't be blocked except by two or more creatures.) | Salvatorre Zee Yazzie

Nomad Outpost | Land | | This land enters tapped.
{T}: Add {R}, {W}, or {B}. | Alayna Danner

Sandsteppe Citadel | Land | | This land enters tapped.
{T}: Add {W}, {B}, or {G}. | Diego Gisbert