In theory, you can put as many cards in your deck as you want
Guild-Inspired Design: Blue and red colors and a Lightning Storm, show off your Izzet Guild love and the chaotic, inventive style of the Izzet League
But this green sorcery is also a very competitive Modern card, above all as sideboard tech in Eldrazi Ramp decks (where it's sometimes a 3x, even if in the sideboard!) Source: MTGStocks And, like Corporeal Projection, it has a single printing, in this case from The Brothers' War
You will choose targets for Iroh's second ability at the beginning of every combat, even if you aren't feeling generous
This information lets you choose the most suitable deck for your play style
The ramp decks tend to have a few more things that ramp with land so as to be safer against mass removal effects