Mirage Drain (ミラージュドレイン) is a keyword introduced in BS57. The effect is worded as follows:
- Mirage Drain: Color(/Color2) (When Summoned)
You can set a Color(/Color2) card with Mirage effects from your Trash, without paying the cost. When you've done so, send two cores from the opposing Field to the Trash, and when Spirits/Ultimates are depleted, put a core from the Void to this Spirit.
Though limited to colors, the keyword allows the player to recycle their cards with Mirage from the Trash. fully utilizing the cards in Trash just as the Purple color always does. As Purple also often summons cards during the Attack Step, even though Mirage Drain is a summon effect, it can also be used in the Attack Step. With only one keyword, the player can switch to a new Mirage, deplete cards, and boost a core. The only true downside is that due to the Mirage rules, the Mirage that's originally set will be switched to the Trash.