Innovative Metatect

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)

Whenever this creature deals combat damage to a player, you may put an artifact card with mana value less than or equal to that damage from your hand onto the battlefield.

Whenever one or more artifact creatures you control deal combat damage to a player, you get (an energy counter).

Pay : Create a tapped 3/3 colorless Robot artifact creature token.

Whenever you seek one or more cards, create a 3/3 colorless Phyrexian Golem artifact creature token.

Golems you control have vigilance.

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)

Whenever one or more Ninja or Rogue creatures you control deal combat damage to a player, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Whenever a creature you control becomes blocked, you may return it to its owner's hand.

Whenever one or more creatures you control deal combat damage to a player, draw a card.

Flying

Metalcraft — Whenever this creature deals combat damage to a player, if you control three or more artifacts, that player mills four cards.