+1: Exile the top card of your library. You may cast that card. If you don't, Chandra deals 2 damage to each opponent.
+1: Add .
−3: Chandra deals 4 damage to target creature.
−7: You get an emblem with "Whenever you cast a spell, this emblem deals 5 damage to any target."

Flying
Other creatures you control get +1/+1.
At the beginning of your upkeep, you may return target creature card from your graveyard to your hand.
Partner (You can have two commanders if both have partner.)

+1: Draw a card, then put a card from your hand on top of your library.
−1: Exile another target permanent you own, then return it to the battlefield under your control.
−6: Choose left or right. Each player gains control of all nonland permanents other than Aminatou controlled by the next player in the chosen direction.
Aminatou, the Fateshifter can be your commander.

Vigilance, trample
This creature enters with X +1/+1 counters on it.
When this creature enters, destroy any number of target artifacts and/or enchantments with total mana value X or less.

(: Add .)

Cycling (, Discard this card: Draw a card.)
When you cycle this card, you may have target player lose life equal to the number of Zombies on the battlefield.

This land enters tapped unless you control two or more other lands.
: Add or .

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Equipped creature has base power and toughness X/X, where X is your life total.
Equip

Enchant creature
Enchanted creature gets +2/+2 and is goaded. (It attacks each combat if able and attacks a player other than you if able.)
Whenever enchanted creature attacks, defending player gets two rad counters.

All Goblins get +1/+1.
All Goblins are black and are Zombies in addition to their other creature types.

Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.

Flying, lifelink
Mental Organism — Pay 3 life: M.O.D.O.K. connives. Activate only during your turn. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)
Designed Only for Killing — Creatures your opponents control get -1/-1.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
If a source you control would deal damage to a permanent or player, it deals triple that damage instead.

Whenever you cast a spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

: Target creature you control gains protection from the color of your choice until end of turn.

Each opponent gets a poison counter. Then each creature your opponents control gets -1/-1 until end of turn for each poison counter its controller has.

(: Add .)

When Aang enters, airbend another target creature. (Exile it. While it's exiled, its owner may cast it for rather than its mana cost.)
Whenever one or more creatures you control leave the battlefield without dying, you get an experience counter.
At the beginning of your upkeep, create a 1/1 white Ally creature token for each experience counter you have.

Flying
: Add one mana of any color.