For each player, you choose a creature that player controls. Then each player sacrifices all other creatures they control that don't share a creature type with the chosen creature they control. function toggleLegality() { var element = document.getElementById("info-item-legalities") var closed = document.querySelector(".legalities-closed") var open = document.querySelector(".legalities-open") if (element.classList.contains('d-none')) { element.classList.add("d-block") closed.classList.add("d-none") open.classList.add("d-block") element.classList.remove("d-none") closed.classList.remove("d-block") open.classList.remove("d-none") } else { element.classList.add("d-none") closed.classList.add("d-block") open.classList.add("d-none") element.classList.remove("d-block") closed.classList.remove("d-none") open.classList.remove("d-block") } }