Substitute is a keyword that was introduced in the Legion of Super-Heroes expansion.

"Substitute" is a keyword on character cards that represents a payment power that functions in the hand. The keyword "substitute" means, "Reveal this card >>> You may remove from the game a ready character you control with cost greater than or equal to the cost of this card. If you do, put this card into play. Use only if this card is in your hand and only during your recruit step."

- The revealed card goes onto the chain with this effect. If the effect leaves the chain before resolving, or if the modifier's controller does not remove an appropriate character from the game, the revealed card goes back to its owner's hand.

- To "substitute" a character is to put it into play through a substitute effect.