Stairs to Infinity was the special promo card not included in any of the four Planechase (2012 Edition) decks that was given at release events
Rare LVAL-JP079 Oath of Comrades Normal Trap Card Activate if you control no Monster that was Special Summoned from the Extra Deck, by selecting 1 face-up Monster your opponent controls that was Special Summoned from the Extra Deck
However, there are also some downsides to investing in Japanese Yu-Gi-Oh
It is not an official term found either on cards or within the rules, but is so ubiquitous that it may as well be
C Common Saffira, Divine Dragon of the Voiceless Voice X LIGHT Level 7 [ DragonRitualEffect ] ATK 2550 DEF 2450 You can Ritual Summon this card with "Blessing of the Voiceless Voice"
UR Ultra Rare Redbeard, the Plunder Patroll Matey X WATER Level 4 [ FiendEffect ] ATK 1000 DEF 1000 During your opponent's turn (Quick Effect): You can Special Summon 1 "Plunder Patroll" monster from your Extra Deck with the same Attribute as a monster your opponent controls or is in their GY, and if you do, equip this card you control to it
