Shaggy and Scooby

When Shaggy and Scooby enters, create
Scooby, a legendary 2/2 green Dog Detective creature token with trample.
{1}, Sacrifice an artifact token: Put a +1/+1 counter on each Dog you control.
Whenever a Dog you control deals combat
damage to a player, create a Scooby Snack
token, then investigate.