YGO Tools v0.7.0 Metaltronus Helper
Pick any non-Token monster — the one your opponent controls, or the one you want to Special Summon. The list shows every monster that shares two or more of Type, Attribute, and/or ATK. Those are legal summons if the selected card is the target, or legal targets if it is the summon.
Any non-Token monster, including Extra Deck. Use it as the opponent's target or as the monster you want to summon.