yu gi oh structure deck blue eyes white destiny Yu-Gi-Oh! Blue-Eyes The Blue Yu-Gi-Oh! Trading Card Game: Blue

The first trigger condition means an eerie ability can potentially trigger twice thanks to a single Room card, once when it enters and again when it becomes fully unlocked

More demon support coming in the form of cheap well-stated creatures

Whats important to note here is the language of the text

Italian Doppio Difensore Una volta per turno, quando un mostro dell'avversario dichiara un attacco mentre controlli 2 o pi mostri scoperti in Posizione di Difesa: puoi scegliere come bersaglio il mostro attaccante

Each time an "Ursarctic" monster(s) is Special Summoned from the hand or Extra Deck: You can remove 1 counter from this card