Now Im teaching you
He would cast Retraction Helix on a creaturesay Rattleclaw Mystictap it to return Briber's Purse to his hand, cast Briber's Purse for zero mana, untap his Mystic with Jeskai Ascendancy, and repeat the process until his Rattleclaw Mystic had +1,000/+1,000 from Jeskai Ascendancy, then attack for the win
Its also among the most ubiquitous: its poster-child commander choice is literally the No
If your commander cares about tapping, you probably care about Patriar's Seal which is way more flexible as a colorless card
All Wizards had to do was change the casting cost to 1RG and add "legendary" to its type line
Everything you see (card type, creature type, expansion symbol, rules text, power, toughness, and artist credit) are now all overwritten