msem-instigator

Lifelink
When Milunda, Prairie Prince enters, each opponent loses life equal to the number of storied permanents you control and you gain that much life. (Enchantments and legendary permanents are storied.)

{1}{R}: Exile the top card of your library. If it's a creature card, you may play it until the end of your next turn.
{4}{W}: Put two +1/+1 counters on target creature.

Flying
Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
Other creatures you control get +1/+1 for each +1/+1 counter on Protector of the League.

At the beginning of your end step, if you cast no spells this turn, untap target creature.

Crimson Sunrise deals 4 damage to each creature. Each player sacrifices four nonbasic lands.

Whenever a creature card is put into your graveyard from anywhere, it gains revive until the beginning of your next end step. The revive cost is equal to its mana cost increased by {1}. (Pay that card's mana cost increased by {1}, Exile that card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Creatures you control get +1/+0 and attack each turn if able.
As long as you control four or more Mountains, attacking creatures you control get an additional +1/+0 and have first strike.

Flame Jolt deals 2 damage to target creature and 1 damage to target player or planeswalker.

{T}, Sacrifice Synthetic Seedling: Choose a basic land type. Create a tapped colorless enchantment land token with the chosen type.

Each player draws a card, then target player mills X cards, where X is the number of cards players have drawn this turn.

You may exert Accursed Bear as it attacks. When you do, it gets +1/+0 and gains trample until end of turn. (An exerted creature won't untap during your next untap step.)

Return Portal to the Unknown to its owner's hand: Add {U}{U}{U}. The next card you cast this turn can be cast as though it had flash.

Lifelink
Frostguard Sentry has flying as long as it has a +1/+1 counter on it.

Solemn Bastion enters tapped. When it enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
{T}: Add {W} or {B}.

Exile target nontoken creature. That creature's controller creates X 1/1 red and white Warrior creature tokens, where X is that creature's mana value.

Whenever a nontoken creature you control dies, create a 1/1 black Spirit creature token with flying.
[+1]: Each opponent loses 2 life and you gain 2 life.
[–2]: You may sacrifice a creature. When you do, destroy target nonland permanent.

{T}, Pay 1 life: Add {B} or {R}.
{1}, {T}, Sacrifice Grim Slums: Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Equipped creature gets +2/+2 and protection from black and from red.
Whenever equipped creature deals combat damage to a player, that player loses 3 life unless they discard a card or sacrifice a nonland permanent. You discard a card, then you draw two cards.
Equip {2}

Whenever a creature deals combat damage to you, that creature's controller gains control of Nightmare Alley.
{T}: Add {C}.
{1}, {T}: Target attacking creature gets +1/+0 until end of turn and can't be blocked this turn.

Fiery Erasure deals 3 damage to target creature or planeswalker. If that permanent would die this turn, exile it instead.

Flying, menace, haste
Twisted Archangel has indestructible as long as an opponent has four or more cards in hand.

Put a +1/+1 counter on each creature you control. Creature tokens you control gain vigilance until end of turn.

At the beginning of combat on your turn, amass Soldiers 1. (Put a +1/+1 counter on an Army you control. It's also a Soldier. If you don't control one, create an 0/0 black Soldier Army creature token first.)
Armies you control have flying and lifelink.

Ambitious Ostrich has flying as long as you control a storied permanent. (Enchantments and legendary permanents are storied.)