Serpent Generator

Flying

This creature enters with three +1/+1 counters on it.

, Remove a +1/+1 counter from this creature: Create a 1/1 colorless Triskelavite artifact creature token with flying. It has "Sacrifice this token: This token deals 1 damage to any target."

When this creature enters, create four 1/1 colorless Myr artifact creature tokens.

Whenever this creature attacks, you may tap X untapped Myr you control. If you do, this creature gets +X/+0 until end of turn and deals X damage to the player or planeswalker it's attacking.

When this artifact enters, it deals 5 damage to target creature.

, Discard this card: Destroy target artifact.

Flash

When this artifact enters, it deals 6 damage to target creature an opponent controls.

Cycling (, Discard this card: Draw a card.)

Indestructible

As this creature enters, choose a player.

Whenever this creature is dealt damage, it deals that much damage to the chosen player.

: This creature deals 1 damage to itself.

Whenever this creature attacks, create a colorless Construct artifact creature token named Twin that's attacking. Its power is equal to this creature's power and its toughness is equal to this creature's toughness. Sacrifice the token at end of combat.