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

Offspring {1}{R} (You may pay an additional {1}{R} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) Whenever another creature you control enters, this creature deals 1 damage to each opponent.

Whenever this creature attacks, defending player loses 1 life and you gain 1 life.

Boltwave deals 3 damage to each opponent.

When this creature enters, it deals 1 damage to each opponent and 1 damage to each creature your opponents control.

Haste Whenever a player casts their second spell each turn, this creature deals 2 damage to target opponent.

Whenever you attack with one or more Lizards, this creature deals 1 damage to target opponent. {1}{R}: Put a +1/+1 counter on this creature. Activate only if an opponent lost life this turn and only once each turn.

Whenever an opponent activates an ability of an artifact, creature, or land that isn't a mana ability, this creature deals 1 damage to that player. {3}{R}{R}: This creature gets +3/+3 and gains menace until end of turn.

Whenever a creature you control enters, this enchantment deals 1 damage to each opponent.

Offspring {2} (You may pay an additional {2} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) Landfall — Whenever a land you control enters, this creature deals 1 damage to target opponent.

Whenever a commander you control deals combat damage to an opponent, it deals that much damage to each other opponent. Partner (You can have two commanders if both have partner.)

Whenever a player casts a noncreature spell, this creature deals damage to that player equal to the number of noncreature spells they've cast this turn.

Whenever this creature attacks, it deals 1 damage to the player or planeswalker it's attacking.

Landfall — Whenever a land you control enters, this creature deals 1 damage to each opponent.

This creature enters with a +1/+1 counter on it if an opponent lost life this turn. {1}{B/R}: This creature gains menace until end of turn. (It can't be blocked except by two or more creatures.)

Changeling (This card is every creature type.) Whenever an opponent casts a spell, you may put a +1/+1 counter on this creature.

End the Festivities deals 1 damage to each opponent and each creature and planeswalker they control.

Tectonic Hazard deals 1 damage to each opponent and each creature they control.

Destroy target artifact you don't control. Overload {4}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

When this creature enters, if an opponent lost life this turn, add {B}{R}. {1}{R}, Discard a card: Draw a card.

At the beginning of your upkeep, you draw a card and you lose 1 life.