msem-instigator

This spell costs {W} less to cast if it targets a black or red permanent.
Exile target nonland permanent with mana value 3 or less.

When Ophidian Oracle enters, draw a card, then abound. (To abound, you may cast a spell that costs less than this from your hand without paying its mana cost.)
Recite {2}{G}{G} (You may cast this creature from your graveyard for its recite cost. If you do, exile it when it enters or if it would leave the battlefield.)

Bleed {1}{B/R} (You may cast this spell for its bleed cost if an opponent has lost life this turn.)
Haste
When Opportunistic Raiders enters, if it's your main phase, after this phase, there is an additional combat phase followed by an additional main phase.

Creatures can't attack you unless their controller pays {3} for each of those creatures.

When Oracle of Edicts enters, adjudicate. (Create a white Aura enchantment token with enchant creature and “Sacrifice this token: Untap enchanted creature” attached to target creature.)
Whenever an Aura you control enters, scry 1.

Deception {U}{B} ({U}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Oshiruko Conspirator deals combat damage to a player, you may discard a Rogue card. If you do, search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle.

Enchant player
At the beginning of your upkeep, enchanted player loses 1 life.

When Over the Horizon enters, scry 1.
{T}: Add {C}.
{1}, {T}: Return Over the Horizon to its owner's hand.

Enchant creature
Enchanted creature can't attack or block.

Bleed {R} (You may cast this spell for its bleed cost if an opponent has lost life this turn.)
Add {R}{R}{R}.

Put target spell or nonland permanent on top of its owner's library.

When Palesoul Mender dies, you gain life equal to its toughness.

{1}, {T}, Pay 1 life: Add one mana of any color. Put a charge counter on Paradox Rings.
{T}, Remove three charge counters from Paradox Rings and sacrifice it: Draw a card.

Players can't pay alternative costs to cast spells. (Casting a spell without paying its mana cost is an alternative cost.)

Enchant creature
Enchanted creature gets +1/+1 and has “At the beginning of each end step, you gain 1 life.”

Enchant creature
Enchanted creature gets +1/+0 and has haste.
Once each turn, when enchanted creature becomes tapped, you may add {R}{R}. Until end of turn, you don't lose this mana as steps and phases end.

When Patient Herbology enters, rouse 2. (Distribute two +1/+1 counters among permanents you control. If they aren't creatures, tap them and they become 0/0 creatures in addition to their other types.)
Sacrifice Patient Herbology: Untap target land. You gain 2 life.

Whenever you draw a card except during your draw step, you gain 1 life.
{5}{U}: Draw a card.

Return target creature you control and target creature you don't control to their owners' hands.

Reveal the top two cards of your library. Put one of them into your hand, then target opponent may have you put the other on the bottom of your library. (Otherwise put it back on top.)

At the beginning of each main phase, each player adds {W}{U}{B}{R}{G}.

Whenever a creature dies, scry 1.
{2}{U}, Exile a creature card from your graveyard: Draw a card.

When Persecution Official enters, choose a creature card name.
Cards with the chosen name can't be cast.

{T}, Sacrifice Phosphorescent Ravine: Search your library for an Island or Swamp card and put it onto the battlefield tapped, then shuffle.

Each opponent loses 1 life. Whenever you cast another spell this turn, each opponent loses 1 life.
Acquiesce (If you cast this spell from your hand, exile it as it resolves. When one or more creatures you control deal combat damage to an opponent, you may cast this card from exile without paying its mana cost.)