msem-instigator

Choose target spell. Scry 3, then reveal the top card of your library. Counter the chosen spell unless its controller pays {X}, where X is that card's mana value. (To scry 3, look at the top three cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Flying
When Sphinx of Riddles enters, secretly choose a card name. You may reveal the chosen name any time.
Whenever a spell an opponent controls with the chosen name resolves, you may draw two cards.

Return target creature to its owner's hand.
Draw a card.

When Through the Dust enters, it becomes an Aura with enchant creature. Reveal the top seven cards of your library, put a creature card revealed this way onto the battlefield and attach Through the Dust to it. Then put the rest on the bottom of your library in any order. When Through the Dust is no longer on the battlefield, enchanted creature's controller sacrifices it.
Mirage {1}{U}{U}{U} (You may cast this spell as though it had flash for its mirage cost. If you do, sacrifice it at the beginning of the next cleanup step.)

Choose one —
• Target player mills four cards.
• Draw a card.

Defender (This creature can't attack.)
Mirage {0} (You may cast this spell as though it had flash for its mirage cost. If you do, sacrifice it at the beginning of the next cleanup step.)

Choose one —
• Target opponent discards a card.
• Amosis Charm deals 1 damage to any target and you gain 1 life.

Deathtouch
Tribute 3 (As this creature enters, an opponent of your choice may put three +1/+1 counters on it.)
When Avatar of Amosis enters, if tribute wasn't paid, you may destroy target creature.

{T}, Exile a card from your graveyard: Add {B}.

Tribute 2 (As this creature enters, an opponent of your choice may put two +1/+1 counters on it.)
At the beginning of your upkeep you lose life equal to the number of +1/+1 counters on Descendant of Caaseb.

Desert Slaughterer can't block.
{B}, Remove a +1/+1 counter from a creature you control: Return Desert Slaughterer from your graveyard to the battlefield with a +1/+1 counter on it.

Target opponent reveals their hand. You choose a creature or planeswalker card from it. That player discards that card.

Enchant creature
Enchanted creature gets -2/-2.
At the beginning of the upkeep of enchanted creature's controller, that player discards a card.

Enchant creature
When Double Arming enters, put a +1/+1 counter on enchanted creature.
Enchanted creature has menace.
{5}: Return Double Arming to its owner's hand.

At the beginning of your upkeep, each opponent loses 1 life and you gain 1 life.

Defender (This creature can't attack.)
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Flying
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Enchant creature
Enchanted creature gets +3/+3 and has trample.

Tribute 1 (As this creature enters, an opponent of your choice may put a +1/+1 counter on it.)
When Haggard Jackal enters, if tribute wasn't paid, each opponent discards a card.

Destroy target creature. If you do, you may put a +1/+1 counter on a creature you control.

Tribute 1 (As this creature enters, an opponent of your choice may put a +1/+1 counter on it.)
When Lasis Persecutor enters, if tribute wasn't paid, it gains deathtouch. (This effect lasts indefinitely.)

Whenever one or more creatures attack Menes, the Great Pyramid, create a tapped 2/3 black Mummy creature token.
[+1]: You get an emblem with “Black creatures you control get +1/+1.”
[–3]: Exile target creature card from a graveyard. Create a tapped token that's a copy of it except it's a black Mummy.

As an additional cost to cast this spell, exile a creature card from your graveyard.
Create a tapped 2/3 black Mummy creature token.

When Njel Crocodile enters, you may have it fight target creature. (Each deals damage equal to its power to the other.)

Search your library for a land card and put that card onto the battlefield tapped with a venom counter on it. It gains “Whenever this land is tapped for mana, you lose 1 life.” Then shuffle.