msem-instigator

Double strike
The first spell you cast during each of your turns costs {W}{U}{B}{R}{G} less to cast. This effect reduces only the amount of colored mana you pay.

Whenever Perfecting Forgemaster enters or attacks, you may sacrifice an artifact. If you do, look at the top six cards of your library. You may reveal an Equipment card from among them. Put it onto the battlefield if its mana value is less than or equal to the sacrificed artifact's mana value. Otherwise, put it into your hand. Then shuffle.

When Grave Wrangler enters, you may return target creature card from your graveyard to your hand.

Double strike
Whenever an opponent casts a spell that targets you or a spell or permanent you control, Alrathan Outcast deals damage equal to twice its power to that player.
Alrathan Outcast gets +1/+1 for each Aura and Equipment you control.

Target player discards two cards.
Ferocious — That player discards two cards at random instead if you control a creature with power 4 or greater.

Enchant creature
Enchanted creature can't be blocked.
{1}{G}: Enchanted creature gets +1/+1 and gains hexproof until end of turn.

Equipped creature gets +2/+2 and has flying and lifelink.
When equipped creature deals combat damage to a player, unattach Shionoshio, Ocean's Vow, then transform it.
Equip {W}{U}
Shionoshio can be your commander.

Whenever you innovate, put a loyalty counter on Volta the Innovator. (You innovate as you cast a spell, draw a card, or have a land enter beyond the first of each in a turn.)
[–2]: If you would draw a card this turn beyond the first, draw twice that many cards instead.
[–3]: Whenever you cast your second spell this turn, copy it. You may choose new targets for the copy.

Trample
Shapen, Spiteful Creation must be blocked each combat if able.
The first time Shapen, Spiteful Creation would be dealt damage each turn, prevent that damage.

Target creature gets -3/-3 until end of turn. You gain 3 life. (Then exile this card. You may cast the creature later from exile.)

Prevent all combat damage target creature would deal this turn. You gain life equal to that creature's power.

This spell costs {2} less to cast as long as you control a Saga.
When Engrossed in the Tale enters, exile target creature an opponent controls until Engrossed in the Tale leaves the battlefield.

When Endrison Familiar enters, reveal the top four cards of your library. Put all land cards revealed this way into your hand and the rest into your graveyard.

Whenever a player casts a non-Dwarf spell or plays a non-Mountain land, this creature deals 2 damage to that player.
{1}{R}, Discard this card: Search your library for a Dwarf or Mountain card, reveal it, put it into your hand, then shuffle.

Flash
Enchant creature
Enchanted creature gets +2/+2 and has flying and “At the beginning of your upkeep, you lose 1 life and create a 1/1 black Harpy creature token with flying.”

Vanishing 2 (This permanent enters with two time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Whenever a time counter is removed from Evade the Authorities, you may return target creature to its owner's hand.

When Journey to the Syzygy Spire enters, draw a card, then choose a creature card name.
Whenever a creature you control with the chosen name deals combat damage to a player, draw a card.

Enchant opponent
Whenever a creature you control deals combat damage to enchanted player, draw a card.

Kicker {2}{B} (You may pay an additional {2}{B} as you cast this spell.)
Flying
When Heartstabber Mosquito enters, if it was kicked, destroy target creature.

{T}: Add {C}.
{T}: Each opponent may draw a card. For each player who does, draw a card.

Choose one —
• Put a -1/-1 counter on target attacking or blocking creature.
• Scarring Censure deals 2 damage to target attacking or blocking creature.

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.

When CySec Moderation Council enters, choose a nontoken enchantment you control or an enchantment card in your graveyard. Conjure a duplicate of that card into your hand.

Gain control of target creature.

Flash
Whenever you cast another spell with flash or an instant, put a +1/+1 counter on High Street Shadow.