Sona, Harmonious

Sona, Harmonious reads “At the end of your turn, if I'm at a battlefield, ready up to 4 friendly runes.” “If I’m at a battlefield,” appears where we would expect it to based on the sequence described above, so it is part of the condition and not the effect. The ability can be split into “At the end of your turn, if I’m at a battlefield,” and “ready up to 4 runes.”