Game of Chaos [Ice Age] SV9 you can halve the ATK

you can halve the ATK and DEF of 1 face-up monster your opponent controls

Set: Fifth Edition Type: Artifact Rarity: Rare Cost: {1} Mana Vault doesn't untap during your untap step

This must be declared when the monster is destroyed

Set: Neo Genesis Unlimited Type: Colorless Rarity: Uncommon Retreat cost: Colorless

this card gain respective effect

Game of Chaos [Ice Age] SV9 you can halve the ATKSet: Ice Age Type: Sorcery Rarity: Rare Cost: {R}{R}{R} Flip a coin. If you win the flip, you gain 1 life and target opponent loses 1 life, and you decide whether to flip again. If you lose the flip, you lose 1 life and that opponent gains 1 life, and that player decides whether to flip again. Double the life stakes with each flip.