msem-instigator

Promenade Banner enters tapped.
{1}, {T}: Creatures you control get +1/+1 until end of turn.

Whenever an opponent fails a trial, create a 1/1 white Angel creature token with flying.

Defender, reach
Bulwark — {X}, {T}: Rampart Ballista deals X damage to each opponent. X can't be greater than the number of creatures you control with toughness 4 or greater.

{4}{G}: Monstrosity 2. (If this creature isn't monstrous, put two +1/+1 counters on it and it becomes monstrous.)
When Mountain Bighorn becomes monstrous, you may have it fight target creature you don't control.

Exile two target creatures, planeswalkers and/or enchantments, then return one of those cards to the battlefield under its owner's control.

Exile target creature or planeswalker. Its controller conjures a card named Data-Point into their hand. (It's a sorcery that costs {2} with “Draw a card.”)

Menace, haste
Whenever another creature dies, you get a blood counter.
{B}{R}, Pay two blood counters: Return Dthan, Who Bloodies the Sands from your graveyard to the battlefield.

{T}: Add one mana of any color.

Prevent all damage target spell or permanent would deal this turn. You gain life equal to the damage prevented this way.

Defender
Ascend {1}{W}{W} ({1}{W}{W}: Exile this creature, then return it to the battlefield transformed. Ascend only as a sorcery.)

Destroy all creatures. Each player shuffles their graveyard into their library.

Defender, trample
Tap any number of other untapped creatures you control with total toughness 8 or greater: Formidable Bulkvine's base power becomes 8 until end of turn and it can attack this turn as though it didn't have defender.

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)
As you reveal a creature card, you may exile it. If you do, you may play that card as long as it is exiled and that spell can't be countered by spells or abilities.

At the beginning of your end step, any number of target players mill three cards.
{5}{U/B}, {T}: You may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost. Activate only as a sorcery.

Venerated Beast can't be blocked by more than one creature.

Gain control of target non-Pirate, non-Rogue creature until end of turn. Untap that creature. It gains haste until end of turn. Pirates and Rogues you control get +1/+0 until end of turn.

{1}{U}{B}, Exile a creature card from your graveyard: Vestige of Evil has base power and toughness equal to the exiled creature's power and toughness until end of turn.

{T}: Add {G} or {U}.
{G}{U}, {T}: Return target creature you control to its owner's hand.

{T}, Sacrifice an artifact or enchantment: Draw a card.

At the beginning of your upkeep, you lose 1 life, then investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
Whenever you sacrifice a permanent, each opponent loses 1 life.

Flying, prowess
Once each turn, when you cast a noncreature spell, you may create a 4/4 blue Sphinx Wizard creature token with flying, then scry 1.
{2}{U}{U}, Discard Sage of the Hereafter: Create a 4/4 blue Sphinx Wizard creature token with flying, then scry 1. Activate only as a sorcery.

Take an extra turn after this one. At any time during that turn, you may search your opponents' libraries for a card and exile it, then shuffle that player's library. You may cast that card from exile, and you may spend mana as though it were mana of any type to cast it. If you don't, shuffle that card into its owner's library.
Exile Isles Uncharted.

Noncreature spells your opponents cast cost {1} more to cast for each counter on Judges of Bearidge.
{5}{W}{U}: Put a +1/+1 counter on Judges of Bearidge, then detain each creature with lesser power. (Until your next turn, those permanents can't attack or block and their activated abilities can't be activated.)

Create a 2/2 red Dragon creature token with flying and haste.
Whenever a nontoken Dragon you control attacks, you may return Flynn's Wonder from your graveyard to your hand.

Tribute 1 (As this creature enters, an opponent of your choice may put a +1/+1 counter on it.)
When Giant Dromad enters, if tribute wasn't paid, you may destroy target artifact or enchantment.