Lieutenant — At the beginning of combat on your turn, if you control your commander, create two 1/1 red Goblin creature tokens. Those tokens gain haste until end of turn. {2}, Sacrifice a Goblin: This creature deals 1 damage to any target.
His crew proudly maintains an accident rate of 100% per day.
Tempting offer — Choose target instant or sorcery spell. Each opponent may copy that spell and may choose new targets for the copy they control. You copy that spell once plus an additional time for each opponent who copied the spell this way. You may choose new targets for the copies you control.
Whenever you sacrifice a Desert and whenever a Desert card is put into your graveyard from your hand or library, put that card onto the battlefield under your control at the beginning of your next end step. At the beginning of combat on your turn, if you control five or more Deserts, create that many 1/1 red, green, and white Sand Warrior creature tokens. They gain haste.
Trample This creature gets +10/+10 for each player who has lost the game. Whenever this creature deals combat damage to a player, you may mill that many cards. Put any number of land cards from among them onto the battlefield tapped.
{T}: Add two mana in any combination of colors. {T}: Until end of turn, target land you control becomes an X/X Citizen creature with haste in addition to its other types, where X is twice the number of Gates you control. Activate only as a sorcery. Tap an untapped Gate you control: Untap this creature.
Create X tokens that are copies of target creature you control, except they have "When this token enters, it fights up to one target creature you don't control."
"I am an esteemed scientist. Base violence is beneath me. Luckily, it's not beneath my subjects." —Gulistan, Simic biomancer
Whenever you cast an instant or sorcery spell that targets only a single nonland permanent an opponent controls, if another opponent controls one or more nonland permanents that spell could target, choose one of those permanents. Copy that spell. The copy targets the chosen permanent. {1}{B}: Regenerate this creature.
When you cast this spell, each player sacrifices X creatures. This creature enters with two +1/+1 counters on it for each creature sacrificed this way. Flying, trample
Flash When this creature enters, until end of turn, whenever a nontoken creature you control dies, create a number of 1/1 green Saproling creature tokens equal to that creature's power.
Jund doesn't have a food chain so much as a mass feeding frenzy.
Whenever a creature you control attacks, you get {E}. {T}, Pay six {E}: Create a 6/12 colorless Construct artifact creature token with trample. Activate only as a sorcery.
"Like my people's ambitions, it is both awe-inspiring and unfinished." —Nahiri
{T}, Pay 1 life: Add one mana of any type that a land you control could produce. {3}, {T}: You may put a land card from your hand onto the battlefield tapped. {1}, {T}, Sacrifice this land: Draw a card.
{T}: Add {C}. {T}, Sacrifice a creature: Add one mana of any color. {X}{2}, {T}, Sacrifice a Desert: Exile target creature card with mana value X from your graveyard. Create a token that's a copy of it, except it's a 4/4 black Zombie. Activate only as a sorcery.
This land enters tapped. {T}: Add {U}. {1}{U}, {T}, Exile seven cards from your graveyard: Add {U}. When you spend this mana to cast a spell or activate an ability, copy that spell or ability. You may choose new targets for the copy.
When this land enters, up to one target creature phases out. {T}: Add {C}. {1}, {T}: Add one mana of any color. {4}: Put this card from your hand onto the battlefield.
Whenever Azlask or another colorless creature you control dies, you get an experience counter. {W}{U}{B}{R}{G}: Creatures you control get +X/+X until end of turn, where X is the number of experience counters you have. Scions and Spawns you control gain indestructible and annihilator 1 until end of turn.
Coram gets +X/+0, where X is the greatest power among creature cards in all graveyards. Whenever Coram attacks, each player mills a card. During each of your turns, you may play a land and cast a spell from among cards in graveyards that were put there from libraries this turn.