Odin was father to many of the Norse gods, and there are parallels with Odin in the artwork, too, such as his having only one eye the other having been given up to Mimir
112.7a Once activated or triggered, an ability exists on the stack independently of its source
Getting double-blue early is a real cost, and this isnt as much better than Cancel-like effect than you might think
In Saga draft, it was a neat trick with Horseshoe Crab, creating what was known as "the Machine Gun." In Odyssey Block, it was said that if you didn't have at least one Psionic Gift in your white-blue deck, you didn't have a good white-blue deck
One of the most straightforward ways of doing so is with Temur Sabertooth, an uncommon creature that lets you spend two mana to bounce another creature back into its owners hand