Your search for "Heimerdinger, Inventor 111/298" revealed the following:
Heimerdinger - Inventor - 111/298 - Rare from Riftbound: Origins, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Six More Vodka Card Text:I have all exhaust abilities of all friendly legends, units and gear.
Heimerdinger - Inventor (Arcane Box Set) - 111a/298 - Promo from Riftbound Promotional Cards, available at 401 Games Canada. Rarity: Promo Finish: Foil Artist: Fortiche Production Card Text:I have all exhaust abilities of all friendly legends, units and gear.