Tsunade drew her card and smirked. "First I'm going to play the Spell card Fissure. This let's me destroy one face up monster with the losest Attack. And that is your Sand Mage." Unless any of them had a counter to the spell, Serena's Mage was destroyed. 

Cora was looking at the Duel when she noticed Yugi look behind them. She looked confused about what he maybe seeing. "Is everything okay Yugi?" She asks.