It can't be combined with other alternative costs, such as casting a spell "without paying its mana cost." To determine the total cost of a spell, start with the mana cost or alternative cost (such as an evoke cost) you're paying, add any cost increases, then apply any cost reductions
Draw bolted onto something you would otherwise pay a card for is worth more like 2 mana and not the single mana it costs when found on its own or near enough to
The flavor is outstanding, and the ability to give a creature double strike so cheaply is going to turn games in your direction
He also did some crazy and questionably moral things, including orchestrating the Bloodlines project, a eugenicist project designed to breed the perfect hero to save Dominaria from the Phyrexianswhich turned out to be Gerrard Capashen, who later, in a plan hailed by Rich Stein as one last crazy plan that actually worked out but made zero sense, cut off Urzas head in the Phyrexian Arena and then teamed up with Karn and Urzas severed head to kill Yawgmoth, saving Dominaria from the Phyrexian invasion
