Participants competed in a series of battles on the first day, with the top players qualifying for the second day of battling
It's a lot of versatility in one card, and here your mana isn't being taxed, just the speed
When you can support it sensibly it is great, it digs relatively deep for a quite low cost and most importantly is instant making it viable in control
Despite her kind of difficult conditions Decks where made especially to bring this Synchro forth and in some cases like the Infernity or the Frog loops they could do it an unlimited amount of times
Her first effect is a continuous effect which prevents her from being targeted for attacks while pointing to a Synchro Monster and the second effect allowing you to target one monster your opponent controls and halve its ATK/DEF when a Synchro Monster you control is destroyed by battle or an opponents card effect
This effect also exists on Arena, but Cliffs taps for mana, which is the difference between unplayable and incredibly useful