When particular heroes are present in a team, they can form a Team Combo.
As a result the ATK, HP, and/or REC of team members that belong to the specified element (sometimes is "ALL elements") go up.
See the Table of Team Combos for the complete list.
Stacking[]
Team Combos do not stack.
When a hero would for instance gain +15% ATK from one Team Combo and +20% ATK from another one, he will get the maximum of the two, which is +20% ATK.
EXCEPTION: "All element" WILL stack with "specific element". Ex: +15% Dark ATK from Serpentian Rogue + with Unnamed Gnome + stacks with +28% All Element ATK from Winged Inferno + with Holy Knight +. Dark heroes gain total of 43% ATK.