As actual playable cards, Slifer and Obelisk are great to use with Obelisk's effect allowing you to destroy all monsters the opponent controls if you tribute two monsters while Slifer gains 1000ATK points for every card you have in your hand so with a drawing strategy in mind, you could potentially give Slifer enough attack power to end the duel in one hit
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Despite having a simple effect, it can be utilized in a variety of ways
This card is unplayable if you go second
Lord of the Archfiend By Published: Description Lord of the Archfiend x9 FIRE [Dragon / Ritual / Effect] ATK/ 3200 DEF/ 2600 You can Ritual Summon this card with "Red-Eyes Armory"
Two quick notes about the tins: they tend to damage the packs inside fairly regularly, so be warned that your cards might end up damaged before you even open them