Cunning Offer
Until the End Phase, an opponent gains control of target Elestral on your field and that Elestral gains the effect "When this Elestral is destroyed in battle you must Expend XXX.”
This content is unofficial Fan Content permitted and is not endorsed or approved by Elestrals. Portions of the materials used are the property of Elestrals LLC. All rights reserved by Elestrals LLC. For more information, see the Elestrals Fan Content Policy at https://www.elestrals.com/fan-content-policy