Orcish Oriflamme [International Collectors' Edition] Modern Horizons and you have no maximum

and you have no maximum hand size for the rest of the game

Set: War of the Spark Promos Type: Legendary Planeswalker — Yanggu Rarity: Uncommon Cost: {2}{G} Each creature you control with a +1/+1 counter on it has "{T}: Add one mana of any color

Set: Revised Edition Type: Artifact Rarity: Uncommon Cost: {1} {T}: Add {C}{C}

Set: Arabian Nights Type: Artifact Creature — Construct Rarity: Uncommon Cost: {1} Brass Man doesn't untap during your untap step

Spend this mana only to cast creature spells

Orcish Oriflamme [International Collectors' Edition] Modern Horizons and you have no maximumSet: International Collectors' Edition Type: Enchantment Rarity: Uncommon Cost: {3}{R} Attacking creatures you control get +1 +0.