msem-instigator

When Doomed Widow dies, create a 1/1 white Spirit creature token with flying.

Whenever Implant Tinkerer or another artifact you control enters, choose one —
• Put a +1/+1 counter on that artifact.
• Implant Tinkerer deals 1 damage to any target and you gain 1 life.

Choose one —
• Permanents you control gain lifelink and indestructible until end of turn.
• Search your library for a card, put it into your hand, then shuffle.
• Destroy target nonland permanent.

Choose one or both —
• Prevent all combat damage that would be dealt to creatures this turn.
• Detain target creature. (Until your next turn, that creature can't attack or block and its activated abilities can't be activated.)

Fury Swipes deals 2 damage divided as you choose among one or two targets. Scry 2.

Choose two —
• Target creature gets +2/+0 until end of turn.
• Two target creatures can't block this turn.
• Target player discards two cards, then draws a card for each card they discarded this way.
• Shi Hou's Command deals 4 damage to target legendary creature or planeswalker.

Enchant creature
Enchanted creature gets +3/+1 and has haste.

Haste
You may exert Brash Charger as it attacks. When you do, creatures with power 1 or less can't block this turn. (An exerted creature won't untap during your next untap step.)

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.

Swarm of Sporemites gets +1/+1 for each creature card and Revelation card in your graveyard.

[+2]: Until end of turn, you may spend mana as though it were mana of any type.
[0]: For each color, put a +1/+1 counter on a creature you control of that color.
[–7]: For each color, search your library for up to one creature card of that color. Put those cards onto the battlefield, then shuffle.

When Broken Spirit enters, exile target creature an opponent controls until Broken Spirit leaves the battlefield.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Spirited (When this creature enters, you may activate one of its activated abilities without paying its costs.)
{1}{R}, Discard a red card: Roggar deals 2 damage to any target. This damage can't be prevented.
{2}{R}, Exile a red card from your graveyard: Create two tapped 1/1 red Elemental creature tokens.

You may look at the top card of your library any time.
{T}: Reveal the top card of your library. If that card has a creature type no creature you control has, put it into your hand.

Enchant creature you control
When Purphoros's Benefaction enters, scry 2.
Enchanted creature gets +1/+1 and has haste.

Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Kindle 2—{2}{G} ({2}{G}, Exile this card from your graveyard: Create two 1/1 colorless Elemental creature tokens. Kindle only as a sorcery.)

First strike
Sacrifice Echo Striker: Target creature gains double strike until end of turn.

Poisonblade Trainee enters with a -1/-1 counter on it.

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
{T}: Add {C}. If you're in a renaissance, add one mana of any color instead.
{3}, {T}: Scry 1.

({T}: Add {B} or {R}.)
As Vacated Bar enters, you may pay {1}. If you don't, Vacated Bar enters tapped.

This spell costs {1} less to cast if it targets an attacking creature.
Target creature gets +2/+0 and gains indestructible until end of turn.

Scry 3, then reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, distribute X +1/+1 counters among any number of target creatures you control, where X is that card's mana value.

Choose X. You may choose the same mode more than once.
• Put two +1/+1 counters on target creature you control.
• Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
• Destroy target artifact or enchantment.

Legacy (You may play this side of this card only from your graveyard. Exile it if it would leave the battlefield or not resolve.)
At the beginning of your upkeep, you may return a creature card from your graveyard to your hand. If you do, you gain 2 life.