The Set Tagline is:

二つの魂！不屈の闘志！今一つとなりて、伝説となれ！融合召喚！「サイバース・クロック・ドラゴン」！
Two souls! With unyielding fighting spirit! Now become one, and give rise to a new legend! Fusion Summon! “Cyberse Clock Dragon”!

Cyberse Clock Dragon obviously comes in 20th Secret Rare