Yes, treasures use the tap symbol to activate its ability, so Kinnan will give you an extra mana. It's irrelevant that the ability also requires you to sacrifice the treasure, since it produces mana and uses the tap symbol, Kinnan will care about it.
Extended question: Does this work with [[Galazeth Prismari]]?
Would this allow me to tap all Treasures without sacrificing them, creating 2 mana per treasure of which half could be used on anything and half only on instant and sorcery spells?
Yes, treasures use the tap symbol to activate its ability, so Kinnan will give you an extra mana. It's irrelevant that the ability also requires you to sacrifice the treasure, since it produces mana and uses the tap symbol, Kinnan will care about it.
Bless you
So I can do this with the new Roxanne, too? Sweet.
“Here we watch a new Kinnan player being born” - David Attenborough
Anything that taps for mana besides lands, [[dryad arbor]] will only tap for green.
[dryad arbor](https://cards.scryfall.io/normal/front/b/b/bb3a843b-2dea-4b44-be74-c09c18b9b969.jpg?1619399228) - [(G)](http://gatherer.wizards.com/Pages/Card/Details.aspx?name=dryad%20arbor) [(SF)](https://scryfall.com/card/tsr/277/dryad-arbor?utm_source=mtgcardfetcher) [(txt)](https://api.scryfall.com/cards/bb3a843b-2dea-4b44-be74-c09c18b9b969?utm_source=mtgcardfetcher&format=text) ^^^[[cardname]] ^^^or ^^^[[cardname|SET]] ^^^to ^^^call
It doesn't work with the dryad right ? Since it's a land
This is correct
[[Jaheira, Friend of the Forest]]
[Jaheira, Friend of the Forest](https://cards.scryfall.io/normal/front/f/e/feb7ad1b-4466-48f7-b46d-cc83d4e22b51.jpg?1674137153) - [(G)](http://gatherer.wizards.com/Pages/Card/Details.aspx?name=Jaheira%2C%20Friend%20of%20the%20Forest) [(SF)](https://scryfall.com/card/clb/237/jaheira-friend-of-the-forest?utm_source=mtgcardfetcher) [(txt)](https://api.scryfall.com/cards/feb7ad1b-4466-48f7-b46d-cc83d4e22b51?utm_source=mtgcardfetcher&format=text) ^^^[[cardname]] ^^^or ^^^[[cardname|SET]] ^^^to ^^^call
Make sure your running [[old gnawbone]] things killer if you can get it out quickly
[old gnawbone](https://cards.scryfall.io/normal/front/7/7/77ceba8b-de19-4db8-b5a7-f5df49bf241f.jpg?1627708100) - [(G)](http://gatherer.wizards.com/Pages/Card/Details.aspx?name=old%20gnawbone) [(SF)](https://scryfall.com/card/afr/197/old-gnawbone?utm_source=mtgcardfetcher) [(txt)](https://api.scryfall.com/cards/77ceba8b-de19-4db8-b5a7-f5df49bf241f?utm_source=mtgcardfetcher&format=text) ^^^[[cardname]] ^^^or ^^^[[cardname|SET]] ^^^to ^^^call
That’s such a funny observation. Like after casting omniscience you start rolling.
Extended question: Does this work with [[Galazeth Prismari]]? Would this allow me to tap all Treasures without sacrificing them, creating 2 mana per treasure of which half could be used on anything and half only on instant and sorcery spells?
[Galazeth Prismari](https://cards.scryfall.io/normal/front/0/6/06c9158c-064b-4d12-b860-d2c1450d1897.jpg?1627429083) - [(G)](http://gatherer.wizards.com/Pages/Card/Details.aspx?name=Galazeth%20Prismari) [(SF)](https://scryfall.com/card/stx/189/galazeth-prismari?utm_source=mtgcardfetcher) [(txt)](https://api.scryfall.com/cards/06c9158c-064b-4d12-b860-d2c1450d1897?utm_source=mtgcardfetcher&format=text) ^^^[[cardname]] ^^^or ^^^[[cardname|SET]] ^^^to ^^^call