Overlord II X Chain Chronicle 3

Overlord II X Chain Chronicle 3 (オーバーロードII × チェンクロ3) was a collaborative game festival hosted in the smartphone app game Chain Chronicle 3 featuring characters from Overlord. It was held from February 15, 2018 to February 28, 2018.

Undead King and the Five Wizards
A group of "lost" people came to the Labyrinth Mountains. However, there, they are suddenly sucked into the open hole. When they awoke, what appears before them was a mighty skeleton wizard.

Trial Nazarick
A quest where you can use a party organized by collaboration characters that appear in festivals! Trial quests can earn more mana than regular battles, so let's enjoy the mighty power of "Nazarick" by using special moves!

Trivia

 * The collaboration characters that will appear at this festival were scheduled to appear only at the event gacha.
 * Players can draw the "SSR Confirmed" gacha for free only once when they draw the target gacha 30 times.