Cast this turn one, swing turn two, ting the defender, toss a +1/+1 counter here with your mana, you've now dealt three with your 2/3
This is possible by using certain combinations of cards.) Technically speaking if a non-mana ability of a land produces mana like this, the ability of Caged Sun will trigger and it will not be a mana ability in this case according to the strict interpretation of the rules (and thus will use the stack.) In other words, whether the ability of Caged Sun is a mana ability or not depends on what's triggering it
Cards in your cost area
And yeah, its got a lot more going on, plus its a clear indication of many more Marvel sets coming our way
Ravnica had seven (Carven Caryatid, Festival of the Guildpact, Quickchange, Remand, Reroute, Shadow of Doubt and Smash and yes, I guess you could count Ribbons of Night)
However, this creature has a drawback, receiving -X/-X where X is your life total