An Invocation card is a unique card that has the power to summon a minimum of 2 and a maximum of 5 creature cards from the same guild. When this card is played, it grants the gamer the extraordinary ability to summon creature cards belonging to the same guild without the need to expend an equivalent amount of mana. Each guild card features a distinctive emblem, a symbol that proudly represents the guild it belongs to. For instance, the Crow Guild Invocation card is specifically designed to summon creature cards adorned with the identical guild emblem prominently displayed on the card. This emblem serves as a visual marker, signifying the guild affiliation of the creatures that can be summoned using this powerful card. Invocation cards can be played once and then returned to the used deck.