Advanced format ruling
Colosseum - Cage of the Gladiator Beasts
Card effect (current official text)Place 1 Counter on this card each time a monster is Special Summoned from either player's Deck. All "Gladiator Beast" monsters gain 100 ATK and DEF for each of these counters on this card. If this card would be destroyed by a card effect, you can discard 1 "Colosseum - Cage of the Gladiator Beasts" to prevent this card from being destroyed.
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.