Advanced format ruling
Lucky Chance
Card effect (current official text)Once per Chain, if a monster effect is activated that tosses a coin once: Call heads or tails. If your call matches the coin toss for that monster effect, draw 1 card immediately after that effect resolves.
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.