Quote from Subject16 »Completing the Eminence commanders and providing a wedge Emrakul follower:
Tovolar, Arcane Alpha 2GUR
Legendary Creature - Werewolf Shaman (Mythic)
Eminence - Whenever another Werewolf you control transforms, if Tovolar, Arcane Alpha is in the command zone or on the battlefield, you may pay 2. If you do, create a token that's a copy of that permanent and a 2/2 green Wolf creature token. They gain haste.
GUR: Search your library for a Wolf or Werewolf creature card, reveal it, and put it into your hand. Then shuffle your library.
Subject of the Moon 1G
Creature - Werewolf Horror (Uncommon)
Whenever Subject of the Moon is put into a graveyard from anywhere, its owner may shuffle it into their library.
At the beginning of each upkeep, if no spells were cast last turn and you both own and control Subject of the Moon and a creature named Tovolar, Arcane Alpha, exile them, then meld them into The Mondronen Voidpack.
The Mondronen Voidpack
Legendary Creature - Eldrazi Werewolf (Mythic)
Trample, hexproof, haste
Whenever The Mondronen Voidpack attacks, for each other attacking Wolf, Werewolf or Eldrazi,create a token that’s a copy of that card and that’s tapped and attacking.
At the beginning of each upkeep, if a player cast two or more spells last turn, create a 4/4 colorless Eldrazi Werewolf creature token with menace.
Steward of Salvation 3WW
Creature - Elephant Cleric (Rare)
Whenever you gain life, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
1W: Target creature gains lifelink until end of turn.
"The Conclave's reach is too short. Now we must protect all Ravnica."
Quote from void_nothing »Menial Subjects 3RR
Creature - Ogre (R)
Trample, menace, infect
When Menial Subjects enters the battlefield, proliferate.
RR, Sacrifice Menial Subjects: Proliferate twice.
Not Urabrask's slaves - compelled to follow him by something dim and suppressed inside.
Eight years later
Voidheart Vizier 5BBB
Creature - Djinn (R)
Whenever you cast a spell, look at target opponent's hand and choose a nonland card from it. That player exiles that card. When they do, each player loses life equal to half that card's converted mana cost, rounded down.
His ego trips make others fall down.
Assure Salvation WU
All spells lose all types and abilities and become instants with "Create a 4/4 white Angel creature token with flying."
"Can there even be a path not leading to a brighter future? Not so." - Ooria, Archangel of Clocks
Noklis, the Abnormal Bloom BGU
Legendary Creature - Elf Druid (R)
T: Untap up to two target tapped lands. Each land you don't control untapped in this way deals 1 damage to its controller.
4, T: If target permanent had a counter removed from it this turn, destroy it. Otherwise, put on it your choice of two +1/+1 counters or two counters of a kind already on it.
Quote from Manite »Instants and sorceries are of course the most convenient way to pump the effect. Here are some examples with cmc 1-10: