Kolaghan, the Storm's Fury [Commander 2017] 203 You can only use this

You can only use this effect of "Diabound Kernel" once per turn

Once per turn: You can return all Spells/Traps your opponent controls to the hand

it assembles two Contraptions instead

Set: EX: Team Magma vs Team Aqua Type: Darkness Rarity: Uncommon Retreat cost: Colorless

Set: XY: Primal Clash Type: Psychic Rarity: Rare Retreat cost: Colorless

Kolaghan, the Storm's Fury [Commander 2017] 203 You can only use thisSet: Commander 2017 Type: Legendary Creature Dragon Rarity: Rare Cost: {3}{B}{R} Flying Whenever a Dragon you control attacks, creatures you control get +1 +0 until end of turn. Dash {3}{B}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)