Ironwill Forger

The tokens created by a single instance of myriad all enter at the same time.

You choose whether each token is attacking the player or a planeswalker they control as the token is created. If it’s attacking a planeswalker, you choose which one. You can’t have any of the tokens attack a battle.

Each token copies exactly what was printed on the original creature and nothing else. It doesn’t copy whether that creature is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on.

If the defending player is your only opponent, no tokens are put onto the battlefield.

Although the tokens enter attacking, they were never declared as attackers. Abilities that trigger whenever a creature attacks won’t trigger, including the myriad ability of the tokens. If there are any costs to have a creature attack, those costs won’t apply to the tokens.

If an instance of myriad creates more than one token for any given player (due to an effect such as the one Doubling Season creates), you may choose separately for each token whether it’s attacking the player or a planeswalker they control.