Metallic Dragons, Arise

When Metallic Dragons, Arise enters the battlefield, create a 5/5 red dragon token with
flying.
{t}: Tap an adventurer you control. If you do, put
a negotiation counter on Metallic Dragons, Arise.
At the beginning of your upkeep, if there are 3
or more counters on this card, you may sacrifice
an equipment to summon four 5/5 red dragon
tokens with flying. Then sacrifice Metallic
Dragons, Arise.