Terminate

Destroy target creature. It can't be regenerated.

Ondu Champion

Rally — Whenever Ondu Champion or another Ally you control enters, creatures you control gain trample until end of turn.

Lightning Bolt deals 3 damage to any target.

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {B} or {R}.

Rally — Whenever Kalastria Healer or another Ally you control enters, each opponent loses 1 life and you gain 1 life.

Changeling (This card is every creature type.)
{1}{B}: Regenerate Skeletal Changeling.

Rakdos Carnarium enters tapped.
When Rakdos Carnarium enters, return a land you control to its owner's hand.
{T}: Add {B}{R}.

Changeling (This card is every creature type.)

Haste
Whenever Akoum Battlesinger or another Ally you control enters, you may have Ally creatures you control get +1/+0 until end of turn.

Whenever Highland Berserker or another Ally you control enters, you may have Ally creatures you control gain first strike until end of turn.

Changeling (This card is every creature type.)
Changeling Outcast can't block and can't be blocked.