msem-instigator

Target creature can't be blocked this turn. It explores. (Reveal the top card of your library. Put it into your hand if it's a land. Otherwise, put a +1/+1 counter on that creature, then you may put that card in your graveyard.)

Choose one or both —
• Each player sacrifices an artifact.
• Each player sacrifices an enchantment.

Whenever Ravencaller or another creature enters the battlefield from your graveyard, create a 1/1 blue Bird creature token with flying.

When Ravenous Chupacabra enters the battlefield, destroy target creature an opponent controls.

Flying
Whenever an opponent discards one or more cards, fateseal 1. (To fateseal 1, look at the top card of an opponent's library, then you may put it on the bottom of that player's library.)

Once each turn, when a creature enters the battlefield under your control, you may draw a card if its power is greater than each other creature's power.

Creature tokens you control get +1/+1 and can block an additional creature each combat.

As an additional cost to cast this spell, sacrifice a creature.
Look at the top X cards of your library, where X is the sacrificed creature's power. Put one of those cards into your hand and the rest into your graveyard.

Death knell — You may sacrifice a nontoken creature. If you do, create a 3/3 black Spirit creature token. (As a creature you control dies, trigger one death knell of that creature or another permanent you control.)
Creatures you control dying causes their death knell to trigger. (In addition to the normal death knell trigger.)

Flying

You may cast a spell with mana value X or less from your hand without paying its mana cost, where X is the number of lands you control.

Reveal the top X cards of your library, where X is the number of lands you control. Put any number of permanent cards revealed this way onto the battlefield and the rest on the bottom of your library in a random order.

As Reborn Altar enters the battlefield, you may pay 3 life. If you don't, it enters the battlefield tapped.
{T}: Add {R}, {W}, or {B}.

As an additional cost to cast this spell, sacrifice a creature.
Return two target creature cards from your graveyard to your hand.

Target creature gets +3/+0 and gains haste and winnow until end of turn. (Damage dealt to it also causes its controller to lose that much life.)

Return target artifact or enchantment card from a graveyard to its owner's hand. You get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)

{2}{B}: Reclaimed Kalak gains indestructible until end of turn.
Revive {3}{W} ({3}{W}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Return target permanent to its owner's hand. Then that player discards a card.

Menace
Crew 2 (Tap any number of creatures you control with total power 2 or greater: This Vehicle becomes an artifact creature until end of turn.)

Flash
{1}, {T}: Scry 1.

Choose one —
• Counter target spell unless its controller pays {2}.
• Draw a card.

Other creatures you control get +0/+1.
{T}: Add {G}.

Take an extra turn after this one. If this spell was cast from exile, take two extra turns after this one instead. Shuffle Reflected Moment into its owner's main library.
Prophecy {6}{U}{U} (Once each turn, you may exile a card with prophecy as you reveal it. When you do, you may cast it for its prophecy cost as long as it's exiled.)

Indestructible
When Reflected Worldwalker enters the battlefield, each player puts their hand into their sideboard.

Destroy up to one target artifact. Create a Gold token. (It's an artifact with “Sacrifice this artifact: Add one mana of any color.”)