To secretly choose the numbers, you and the target opponent should each write down your choice of 1, 2, or 3 without showing them to anyone else
It shows you exactly what type of opening hand people kept and puts everyone but your own in-game knowledge in plain sight of the entire table (and you can hide the fact you may have kept a mediocre opener so they cant judge you, ahem)
In practice, blue decks tend to be very good at blocking creature removal, and the generous wording on the aura means you dont need to risk the enchanted creature in combat to get the benefits
Eternal Might Next, we have the speed demon of the group
Mark of the Oni lets you take and keep control of an opponents creature if youve got em
This is another benefit in that most players have never seen an Inti deck in action, meaning you have the element of surprise against people who haven't seen your deck before