| AlphaMech ST-Thunder Marine |
|Romaji||Arufamekku Esu Ti - Sandā Marīn|
|Type(s)||[ Machine/Fusion/Effect ]|
|ATK / DEF||2200 / 1900|
Lore"AlphaMech S-Terra Marine" + "AlphaMech T-Ocean Thunder"
Must first be Special Summoned from your Extra Deck by removing from play the above cards on your side of the field. (You do not use " "). Once per turn, you can discard 1 card from your hand to select one monster your opponent controls. It cannot attack this turn.