msem-instigator

Untap all creatures and lands you control during each other player's untap step.
Ascend {4}{R}{R}{R} ({4}{R}{R}{R}: Exile this creature, then return it to the battlefield transformed. Ascend only as a sorcery.)

Trample, haste
When Tyrants of Bundan enters, tap all lands target player controls. They don't untap during their controller's next untap step.

You gain twice X life.
Kindle X—{X}{G}{G} ({X}{G}{G}, Exile this card from your graveyard: Create X 1/1 colorless Elemental creature tokens. Kindle only as a sorcery.)

Exile target nonland permanent. You lose 3 life.

Bestial Mob's power and toughness are each equal to the number of creatures you control.
Whenever Bestial Mob deals combat damage to a player, destroy target creature with toughness less than Bestial Mob's power.

Target creature gets +3/-3 until end of turn.
Kindle 3—{B}{R}, Pay 3 life. ({B}{R}, Pay 3 life, Exile this card from your graveyard: Create three 1/1 colorless Elemental creature tokens. Kindle only as a sorcery.)

When Embrace Samang enters, put a charge counter on it for each color among permanents you control.
At the beginning of your first main phase, remove a charge counter from Embrace Samang. If you do, draw a card, then add one mana of any color.

Flying, lifelink, haste
At the beginning of the end step, sacrifice Helix Entity.

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.
Mirage {W/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.)

Each player exiles all permanents they control, draws that many cards, then puts up to that many permanent cards from their hand onto the battlefield. Exile Reform Reality.

[+1]: Up to one other target permanent gains hexproof and indestructible until your next turn.
[–3]: Destroy target tapped permanent.
[–7]: You get an emblem with “If you would lose the game, instead exile this emblem, shuffle all cards you own that aren't on the battlefield into your library, then draw seven cards. Your life total becomes 40.”

If a source would deal combat damage to you or a creature you control, prevent 1 of that damage.

Target player mills five cards. Draw a card for each card type among cards milled this way. (The card types are artifact, creature, enchantment, land, instant, planeswalker, sorcery, and tribal.)

Vigilance, trample
When Threshold Guardian enters, return a creature you control to its owner's hand.

Paranoia—Exile a creature card from your graveyard. (You may cast this spell for its paranoia cost when a permanent you control leaves the battlefield.)
Equipped creature gets +2/+0.
Equip {1}

{2}, Sacrifice Doctored Trail: Draw a card.
{T}, Sacrifice Doctored Trail: Destroy target Clue. If you do, draw a card.

{1}, {T}, Sacrifice Looking Glass: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Kindle 1—{1} ({1}, Exile this card from your graveyard: Create a 1/1 colorless Elemental creature token. Kindle only as a sorcery.)

{T}, Discard your hand: If two or more cards were discarded this way, search your library for a card and put that card into your hand, then shuffle.

Abandoned Forge enters tapped if you control another nonbasic land.
{T}: Add {R} or {W}.

Abandoned Hideout enters tapped if you control another nonbasic land.
{T}: Add {U} or {R}.

Abandoned Laboratory enters tapped if you control another nonbasic land.
{T}: Add {W} or {B}.

Abandoned Preserve enters tapped if you control another nonbasic land.
{T}: Add {B} or {G}.

Abandoned Shores enters tapped if you control another nonbasic land.
{T}: Add {G} or {U}.

Codex — Heraldry; Whimsy; Villainy; Creativity; Brutality. (As this enters, conjure its contents into a shuffled face-up additional library.)
You may spend mana as though it were mana of any color to cast this codex's contents.
Spells you cast are all colors.

Equipped creature has vigilance.
Equipped creature gets +3/+3 as long as you control a Spirit.
Equip {1}