Energy Storm [Ice Age] RC23 if your Defense Position monster

if your Defense Position monster battles an opponent's monster while you have no Spells/Traps in your GY (Quick Effect): You can discard this card

put a scroll counter on Aretopolis

equip this card from your hand to that target as an Equip Spell that gives that card 500 ATK

Remove an arrowhead counter from Serrated Arrows: Put a -1/-1 counter on target creature

then target 1 face-up Xyz Monster your opponent controls

Energy Storm [Ice Age] RC23 if your Defense Position monsterSet: Ice Age Type: Enchantment Rarity: Rare Cost: {1}{W} Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Prevent all damage that would be dealt by instant and sorcery spells. Creatures with flying don't untap during their controllers' untap steps.