Gem-Knight Obsidian [AP08-EN020] Common Basic Lightning Energy [Your Turn] When you attack

[Your Turn] When you attack with a Digimon that has [Gammamon] in its name or is level 5 or higher

and any battle damage your opponent takes becomes halved

Set: The Dark Side of Dimensions Movie Pack: Gold Edition Card type: Effect Monster Rarity: Gold Rare Attack: 1600 Defense: 1000 Once per turn: You can discard 1 Spellcaster-Type monster

if this card is in your Graveyard

Set: Duel Power Card type: Link/Effect Monster Rarity: Ultra Rare Attack: 2000 2 "Trickstar" monsters Each time a "Trickstar" monster(s) is Normal or Special Summoned to a zone(s) this card points to

Gem-Knight Obsidian [AP08-EN020] Common Basic Lightning Energy [Your Turn] When you attackSet: Astral Pack 8 Card type: Effect Monster Rarity: Common Attack: 1500 Defense: 1200 If this card is sent from the hand to your Graveyard: You can target 1 Level 4 or lower Normal Monster in your Graveyard; Special Summon that target.