Shadow (This creature can block or be blocked by only creatures with shadow.)
Whenever The Weaver King deals combat damage to a player, they mill that many cards. Then for each opponent, put a creature card from that player's graveyard that was put there from their library this turn onto the battlefield under your control.

+2: Create a Giant Badger token. (It's a 2/2 Badger creature with "Whenever this token blocks, it gets +2/+2 until end of turn.")
−3: Mill three cards. Put all permanent cards from among them into your hand.
−8: Until end of turn, creatures you control have base power and toughness 8/8 and gain trample.
Greensleeves can be your commander.

+2: Create two 1/1 blue Bird creature tokens with flying.
0: Draw a card. You may put a permanent card with mana value 4 or less from your hand onto the battlefield.
−7: Create a Feroz's Ban token. (It's a artifact with "Creature spells cost more to cast.")
Feroz, Ulgrotha's Warden can be your commander.

When Perforator Crocodile enters, for each creature your opponents control, conjure a card named Stab Wound onto the battlefield attached to that creature.
Cycling

Flying
Once during each of your turns, you may pay rather than pay the mana cost for a spell you cast from exile.
Whenever Dragon's Smile deals combat damage to a player, that player exiles that many cards from the top of their library. You may play those cards this turn.
Crew 3

Rulebreaker — A deck with this commander can have any land cards.
Whenever Grizzlegom attacks, create a 1/1 white Soldier creature token for each Plains you control. Draw a card for each Island you control. Each opponent loses 1 life for each Swamp you control. Put a +1/+1 counter on Grizzlegom for each Mountain you control. You gain 1 life for each Forest you control.

Whenever you cast a permanent spell with in its mana cost or activate an ability with in its activation cost that isn't a mana ability, you may have the value of X become 5. Do this only once each turn.

Rulebreaker — A deck with this commander can have creature cards with mana value 7 or greater of any color identity and any basic land cards.
Whenever a creature you control with mana value 7 or greater attacks, double its power and toughness until end of turn.