Advanced format ruling
Light Barrier
Card effect (current official text)During your Standby Phase, toss a coin. If the result is Tails, the following effects are negated until your next Standby Phase:
● When you Summon an "Arcana Force" monster, choose which effect to apply without tossing a coin. If an "Arcana Force" monster destroys an opponent's monster by battle, you gain Life Points equal to the destroyed monster's original ATK.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.