When an opponent has 10 or less life, if Lurking Jackals is an enchantment, it becomes a 3/2 Jackal creature.

, , Sacrifice Braidwood Sextant: Search your library for a basic land card, reveal that card, put it into your hand, then shuffle.

Enchant creature
At the beginning of your upkeep, you may put an arrow counter on Archery Training.
Enchanted creature has ": This creature deals X damage to target attacking or blocking creature, where X is the number of arrow counters on Archery Training."

, , Exile Thran Foundry: Target player shuffles their graveyard into their library.

Enchant creature
At the beginning of your upkeep, you may put a page counter on Private Research.
When enchanted creature dies, draw a card for each page counter on Private Research.

Target player reveals their hand. You choose a nonbasic land card from it. That player discards that card.

Enchant creature
At the beginning of your upkeep, you may put a fuse counter on Incendiary.
When enchanted creature dies, Incendiary deals X damage to any target, where X is the number of fuse counters on Incendiary.

Sacrifice any number of Mountains. Landslide deals that much damage to target player or planeswalker.

Whenever a black card is put into an opponent's graveyard from anywhere, you may draw a card.

Enchant creature
At the beginning of your upkeep, you may put an infection counter on Festering Wound.
At the beginning of the upkeep of enchanted creature's controller, Festering Wound deals X damage to that player, where X is the number of infection counters on Festering Wound.

Whenever an opponent taps a Mountain for mana, you may gain 1 life.

: You gain 1 life.

Yavimaya Enchantress gets +1/+1 for each enchantment on the battlefield.

Metathran Elite can't be blocked as long as it's enchanted.

Enchant creature
At the beginning of your upkeep, you may put a growth counter on Momentum.
Enchanted creature gets +1/+1 for each growth counter on Momentum.

Whenever a creature attacks, Caltrops deals 1 damage to it.

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When Hunting Moa enters or dies, put a +1/+1 counter on target creature.

, Sacrifice Brass Secretary: Draw a card.

Flying
: Target attacking or blocking creature gets +2/+2 until end of turn.

Exile target nonblack creature. Search its controller's graveyard, hand, and library for all cards with the same name as that creature and exile them. Then that player shuffles.

, , Sacrifice a creature: Fodder Cannon deals 4 damage to target creature.

, : Reveal any number of green cards in your hand. Target creature gets +X/+X until end of turn, where X is the number of cards revealed this way.

Flying
When Iridescent Drake enters, put target Aura card from a graveyard onto the battlefield under your control attached to Iridescent Drake.

: Add .

Flying, protection from green

, : Reveal any number of black cards in your hand. Target creature gets -X/-X until end of turn, where X is the number of cards revealed this way.

, : Reveal any number of blue cards in your hand. Counter target spell unless its controller pays for each card revealed this way.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Thieving Magpie deals damage to an opponent, draw a card.

When Gamekeeper dies, you may exile it. If you do, reveal cards from the top of your library until you reveal a creature card. Put that card onto the battlefield and put all other cards revealed this way into your graveyard.

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
Sacrifice an artifact: Put a +1/+1 counter on target creature.

Enchant creature
: Return enchanted creature and Disappear to their owners' hands.

, : Reveal any number of red cards in your hand. Cinder Seer deals X damage to any target, where X is the number of cards revealed this way.

Haste
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When Keldon Champion enters, it deals 3 damage to target player or planeswalker.

Whenever an opponent casts a creature spell, Aether Sting deals 1 damage to that player.

First strike, haste

Flying, protection from blue