Reinforcement of the Army

Reinforcement of the Army first appeared in the Japanese set Spell of Mask in 2001, later reaching North American markets as a common card in the 2004 Warriors' Strike Structure Deck. As a search card, it allows players to add a Level 4 or lower Warrior-type monster from their deck to their hand, a utility that cemented its status as a foundational staple in competitive play. Its design reflects the strategic focus of the Warrior archetype, prioritizing consistency and speed by thinning the deck to find key components.

The card’s artwork features a commander signaling his troops, capturing the thematic essence of mobilization and military logistics that defines the Warrior card type. Over the years, its impact on the game's balance has been significant enough that it has undergone various restrictions and limitations within the official Forbidden and Limited list. While it has been reprinted in numerous formats and rarities, the version found in Warriors' Strike remains a recognizable piece of the game's history during the mid-2000s expansion era.