Infinity Stones (previously Infinity Gems in the comics) are special stones that can be equipped to characters to grant them special powers and/or stat boosts. They first appeared in Marvel Super Heroes and are returning as Infinity Stones in Marvel vs. Capcom: Infinite.
Marvel Super Heroes Edit
In Marvel Super Heroes, the Infinity Gems are dropped randomly throughout the stage and can be picked up by walking over them. You can activate them to gain certain advantages.
Marvel vs. Capcom: Infinite Edit
The Infinity Stones are select-able on the character selection screen and each has a unique Infinity Surge and an Infinity Storm. The Infinity Surge is an attack that generates Infinity meter. Once the meter is at least 50% full, the Infinity Storm becomes available. Upon activation, the background will change to the color of the Infinity Stone and give the team a significant advantage, slowly draining the Infinity meter until it runs out. Infinity Storm can also give a full access of Level 3 Hyper Combos.
The Infinity Stones are a major plot point in the story. Ultron Sigma has possession of two of the Infinity Stones, Reality and Space, and has become a major threat that seems unstoppable. Due to this, the heroes require the help of Thanos who is imprisoned in the Xgard's prison. Jedah also seems to be in possession of the Soul Stone, likely acquired with the assistance of Dormammu and Firebrand.