Well two things. One is that it is essentially a light pillar / tower that has 1 less quanta generated at the start in exchange for counting for Hope. Does it stack like towers, or do they fill separate slots? If stacked together can they be impacted by earthquake? In a similar vein, can you only have 6 in the deck, or can you have as many as you want?
The second is that perhaps you should alter the beacon's discard effect to work without the need for spell interruption. For example, changing it to "an opponents card that affects your hand, without you having sanctuary to protect you, is automatically negated by the discarding of this card". Examples of the cards would be Silence and Nightmare, for those decks that want a counter to those cards immediately without waiting for the 4-3 quanta for sanctuary, or that don't want to spend deck space on it.
