Jungle hollows effect

[Domginger13]

hey so I have this card jungle hollow and its effect is tap and add a mana to your mana field, but do I add it from my deck or hand, or does jungle hollow become the mana I tapped it for?

[Splicer]

{Jungle Hollow}

Ok, so basically, you know how you tap two forests to play something like {Rampant Growth}? Well, the forests actually say, "add {G} to your mana pool." Think of {Jungle Hollow} as a land that can act like a forest or a swamp when you tap it. You won't grab a land.

[Kaalia with haste]

Mana pool is an invisible place that holds your mana. You keep track oft  this yourself. You can tap jungle hollow for green mana to go to your pool or black mana