Aggressive Mammoth

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Other creatures you control have trample.

Loxodon Sergeant

Vigilance
When this creature enters, other creatures you control gain vigilance until end of turn.

Sandsteppe Mastodon

Reach
When this creature enters, bolster 5. (Choose a creature with the least toughness among creatures you control and put five +1/+1 counters on it.)

Greenbelt Rampager

When this creature enters, pay {E}{E} (two energy counters). If you can't, return this creature to its owner's hand and you get {E}.

Fairgrounds Trumpeter

At the beginning of each end step, if a +1/+1 counter was put on a permanent under your control this turn, put a +1/+1 counter on this creature.

Honey Mammoth

When this creature enters, you gain 4 life.

Loxodon Restorer

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
When this creature enters, you gain 4 life.

Losheel, Clockwork Scholar

Prevent all combat damage that would be dealt to attacking artifact creatures you control.
Whenever one or more artifact creatures you control enter, draw a card. This ability triggers only once each turn.

Loxodon Hierarch

When this creature enters, you gain 4 life.
{G}{W}, Sacrifice this creature: Regenerate each creature you control.

Metamorphic Wurm

Threshold — This creature gets +4/+4 as long as seven or more cards are in your graveyard.

Lulu, Loyal Hollyphant

Flying
At the beginning of your end step, if a permanent you controlled left the battlefield this turn, put a +1/+1 counter on each tapped creature you control, then untap them.
Choose a Background (You can have a Background as a second commander.)

Excavation Elephant

Kicker {1}{W} (You may pay an additional {1}{W} as you cast this spell.)
When this creature enters, if it was kicked, return target artifact card from your graveyard to your hand.

Hamza, Guardian of Arashin

This spell costs {1} less to cast for each creature you control with a +1/+1 counter on it.
Creature spells you cast cost {1} less to cast for each creature you control with a +1/+1 counter on it.

Loxodon Smiter

This spell can't be countered.
If a spell or ability an opponent controls causes you to discard this card, put it onto the battlefield instead of putting it into your graveyard.

Frontier Mastodon

Ferocious — This creature enters with a +1/+1 counter on it if you control a creature with power 4 or greater.

Loxodon Lifechanter

When this creature enters, you may have your life total become the total toughness of creatures you control.
{5}{W}: This creature gets +X/+X until end of turn, where X is your life total.

Mosstodon

{1}: Target creature with power 5 or greater gains trample until end of turn.

Prized Elephant

This creature gets +1/+1 as long as you control a Forest.
{G}: This creature gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Battle Mammoth

Trample
Whenever a permanent you control becomes the target of a spell or ability an opponent controls, you may draw a card.
Foretell {2}{G}{G} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Kazandu Valley

Kazandu Mammoth

Landfall — Whenever a land you control enters, this creature gets +2/+2 until end of turn.

Kazandu Mammoth // Kazandu Valley

Civic Stalwart

When this creature enters, creatures you control get +1/+1 until end of turn.

Loxodon Gatekeeper

Artifacts, creatures, and lands your opponents control enter tapped.

Ghalma's Warden

Metalcraft — This creature gets +2/+2 as long as you control three or more artifacts.