Use Timing
[Attack Phase]
Discard up to 3 SIGNI with different levels from your hand. Then, for each SIGNI you discarded this way, banish 1 of your opponent's SIGNI with the same level. (For example, if you discarded level 2 and level 3 SIGNI, banish 1 level 2 SIGNI and 1 level 3 SIGNI.)