msem-instigator

Whenever you cast a legendary spell, create a 1/1 white Human creature token.
{W}{U}{B}{R}{G}: Search your library for a legendary card, reveal it, put it into your hand, then shuffle. The next legendary spell you cast this turn costs {W}{U}{B}{R}{G} less to cast.

At the beginning of your end step, if you lost 2 or more life this turn, create a 1/1 black Bird creature token with flying. If you lost 4 or more life this turn, instead create a 3/3 black Cat creature token with deathtouch. If you lost 6 or more life this turn, instead create a 5/5 black Golem creature token with trample.

Gain control of target land.

Whenever you cast an instant or sorcery spell from exile, copy it. You may choose new targets for the copy.

Loaded Gift deals 3 damage to any target. If any opponent is cursed, Loaded Gift deals 4 damage to that permanent or player instead.

Haste
Cycling {2} ({2}, Discard this card: Draw a card.)

Foretell {2}{U} (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.)
Put target nonland permanent on top of its owner's library.
Scry 2.

{T}: Add {C}.
Discard Shikai's Redoubt: Exile up to two target cards from graveyards.

Discard your hand. Draw cards equal to the number of creatures that died this turn.

Menace
Savage Stalker attacks each combat if able.

Once each turn, you may activate an additional loyalty ability of a planeswalker you control any time you could cast an instant.

When you discard Attack Vector, you may cast it from your graveyard.
Exile the top two cards of your library. Until the end of your next turn, you may play one of those cards.

Augmented — Whenever you cast a spell from your hand, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, exile cards from the top of your library until you reveal a nonland card with mana value less than that spell's mana value. You may cast that card without paying its mana cost. Put the revealed cards not cast this way on the bottom of your library in a random order.

Dawn Hill Swiftstriker gets +2/+0 as long as you control another Warrior.

When Chamber of Reflections enters, draw a card, then choose a legendary card name.
Permanents you control with the chosen name have hexproof and the “legend rule” doesn't apply to them.

Whenever you activate a loyalty ability of Xanigan, the Darkened Cloud, you get an emblem with exalted.
[+2]: Xanigan deals 2 damage to up to one target and you gain 2 life.
[–3]: You draw three cards and you lose 3 life.
[–7]: Xanigan becomes a 7/7 Demon creature with flying and indestructible that's still a planeswalker. Prevent all combat damage that would be dealt to her.

At the beginning of your upkeep, if you control three or more creatures, you draw a card and you lose 1 life.
{2}{B}{G}: Create a tapped 1/1 Horror creature token that's all colors.

{3}, {T}: Return target creature card from your graveyard to the battlefield under target player's control. That creature deals damage equal to its power to that player.

Enchant creature
Enchanted creature gets +2/+2 and has trample.

Voracious 1 (As this enters, you may sacrifice an artifact or creature. If you do, it enters with a +1/+1 counter on it.)
Haste

Flying
At the beginning of your upkeep, reveal the top card of your library. If it's a creature card, create a 1/1 blue Bird creature token with flying.

{1}{B}, {T}: Target creature gets +2/+2 and gains winnow until end of turn. (Damage dealt to it also causes its controller to lose that much life.)
{3}{B}{B}, {T}: Target creature gets -2/-2 and gains winnow until end of turn.

When Cabinet of Curiosities enters, create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)
If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.

Create three 2/2 red Noble creature tokens with disgraced 1. (Each enters with a -1/-1 counter. Whenever one deals combat damage to a player, remove all -1/-1 counters from it.)

Equipped creature has “{2}, {T}: This creature deals 1 damage to any target.”
{4}: Untap equipped creature.
Equip {3}