First: No more anime characters on the pack?
As a part of the move away from the Deck Modification Pack branding, the pack artwork only features the cover monster, and not an anime character.
Two new monsters for Yuamu are revealed:
碧牙の超越爆速竜（ブルー・トゥース・エンハンスド・バーストドラゴン）Blue Tooth Enhanced Burst Dragon
真紅動の超越撃速竜（レッドブート・エンハンスド・ブーストドラゴン）Red Boot Enhanced Boost Dragon
Also the pack includes a brand new theme of LIGHT Spellcasters used by Goha Yuna from the anime, along with the ultra popular “Official Card Game” theme, “Monarchs” that gains brand new cards to make it work in Rush Duel!