msem-instigator

Whenever another creature enters, Brutish Champion fights that creature.

Protection from colored spells
{5}{C}{C}: Exile target colored permanent.
{5}{C}{C}, Exile Soul of Muetar from your graveyard: Exile target colored permanent.

Whenever Doomsower or another Human you control dies, you draw a card and you lose life equal to that creature's power.

As an additional cost to cast this spell, return any number of creatures you control to their owner's hands. This spell costs {1} less to cast for each creature returned this way.
Whenever Gwynsivir attacks, if a creature entering causes a triggered ability of a permanent you control to trigger this turn, that ability triggers an additional time.

Reach, trample
Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)
Whenever one or more tokens you control enter, put a +1/+1 counter on Harvesttide Nemesis. This ability triggers only once each turn.

{T}: Add one mana of any color. Spend this mana only to cast a creature spell or activate an ability of a creature.
Whenever a creature you control becomes a Demigod or God, untap Terracotta Sage and it becomes a 4/4 Dragon with flying until end of turn.

{3}, {T}: Choose a card name, then reveal a card at random from your hand. If that card has the chosen name, Cursed Scroll deals 2 damage to any target.

Flash
{4}, {T}, Sacrifice this artifact: It deals 3 damage to target creature or planeswalker.

{T}: Add {C}.
{2}, {T}: Put target Aura or Equipment card from your graveyard on top of your library.

Flying
At the beginning of your end step, untap target permanent you control.

Counter target spell unless its controller pays {2}. If that spell targets you or a permanent you control, counter that spell instead.

Artifact creatures you control can't be blocked by nonartifact creatures.
{2}{U}{R}: Put a +1/+1 counter on an artifact creature you control or a progress counter on a Project you control.

Colossal 3—{5}{U} (You may cast this for its colossal cost to have it enter with three +1/+1 counters; or pay {5}{U} as a sorcery: Put three +1/+1 counters on it if it has none.)
When Omendiver's colossal ability puts one or more counters on it, scry 3.

Forgotten Attic enters tapped.
When Forgotten Attic enters, look at the top card of your library. You may put it into your graveyard.
{T}: Add {U} or {B}.

Foretell {4}{R}{R} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Each player sacrifices four lands. A Kingdom Burns deals 4 damage to each creature and each planeswalker.

When Arcanomancer enters, return up to one target instant card and up to one target sorcery card from your graveyard to your hand.

Counter target spell if it shares a color with mana spent to cast Antimagic.

Flying, protection from Dragons

Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)
{1}{B}: Lost Dancer becomes black and gains lifelink until end of turn.

Whenever Wild Bearmaster attacks, each other attacking creature you control gets +X/+X until end of turn, where X is Wild Bearmaster's power.

Whenever Voracious Spawn enters or attacks, exile up to one target card from a graveyard. If you exile a permanent card, put a +1/+1 counter on Voracious Spawn. If you exile a nonpermanent card, you gain 1 life.

At the beginning of your upkeep, exile the top card of your library. If a land card is exiled this way, add {R}{R}. You don't lose this mana as steps and phases end this turn. Otherwise, you may cast that card this turn.

Deeplife Cavern enters tapped unless you control a Forest.
{T}: Add {U} or {B}.

Whenever Ming Fleet Privateer attacks, put a menace counter on target creature in its pack. (Two or more creatures you control with equal power are in a pack.)

Counter target spell unless its controller pays {X}. You may cast a spell with mana value X or less from your hand without paying its mana cost.