msem-instigator

Destroy target artifact or enchantment. Its controller gains 4 life.

Neckbreaker Viking gets +1/+0 and has menace as long as it's embattled. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Counter target noncreature spell.

Counter target instant or sorcery spell unless its controller pays {3}.

Sacrifice a creature: Look at the top card of target player's library. You may have that player put that card into their graveyard.

{T}: Add {C}.
{3}, {T}, Sacrifice No-Man's Land: Draw a card.

Exile target creature. Each player gains life equal to that creature's toughness.
Metamorph {W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

Draw three cards. If you control a Wizard, untap up to three lands.

Equipped creature has “{T}: This creature deals 1 damage to any target.”
Equip {3}

When Obscure Apostle enters the battlefield, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)
Whenever you sacrifice an Idol, Obscure Apostle can't be blocked this turn.

Attacking creatures get -2/-0 until end of turn.
Metamorph {1}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

Enchant planeswalker
Enchanted planeswalker has “+2: Draw two cards, then put a card from your hand on the bottom of your library.”

Exile target creature you control, then return that card to the battlefield under its owner's control. Create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

Whenever you sacrifice an Idol, put a +1/+1 counter on Orchard Botanist.

Whenever Organ Scavenger perseveres, each opponent loses 2 life. (A creature perseveres when it survives damage.)

Destroy target artifact or enchantment with mana value 3 or less.
Ferocious — You gain 4 life if you control a creature with power 4 or greater.

Flash (You may cast this spell any time you could cast an instant.)
Flying
When Orichi of the Cold Mist enters the battlefield, exile another target creature you control. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Flying
Whenever an opponent casts a spell, counter it unless that player pays {1} for each spell cast before it this turn.

Exile cards from the top of your library until you exile an instant or sorcery card. Put that card into your hand, then Overzealous Tutor deals damage to up to one target creature equal to the number of cards you own in exile.

Ferocious — When Pack Familiar dies, if you control a creature with power 4 or greater, create two 2/2 green Wolf creature tokens.

Other creatures you control get +1/+0.
{R}{W}: Create a 1/1 red and white Warrior creature token. That token gains haste. Exile it at the beginning of the next end step. Activate only as a sorcery.

When Paralysis Specialist enters the battlefield, up to two target creatures don't untap during their controller's next untap step.

When Parrying Scholar enters the battlefield, target creature gets +0/+3 until end of turn.

Whenever an opponent casts a spell, sacrifice Patient Orchestration. If you do, look at the top X cards of your library, where X is that spell's mana value. Put up to two of them into your hand and the rest on the bottom of your library in any order.

Flying