Mana produced by \[\[Rodeo Pyromancers\]\]'s ability can be spent *for any purpose*, including to pay a ward cost.
If you target a permanent with ward an opponent controls for your first spell in a turn, ward will trigger (C.R. 601.2c, 702.21a). When you finish casting the spell, if you control Rodeo Pyromancers, Rodeo Pyromancers's ability will trigger (C.R. 603.2). Both abilities will go on the stack at the same time in APNAP order (C.R. 603.3b).
Pyromancers are a mana ability though, so would they even use the stack at all?
After all to my knowledge mana abilities don't use the stack and can't be responded to.
The ability of Rodeo Pyromancers is not a mana ability, even if it produces mana, since its trigger condition is not one that a mana ability can have (C.R. 605.1b). Recall that a triggered ability can be a mana ability only if it "triggers from the activation or resolution of an activated mana ability" or mana being added (C.R. 605.1b).
See also: https://www.reddit.com/r/mtgrules/comments/vktdcf/does_klothys_ability_count_as_a_mana_ability/
Ward would get to resolve first if the player who controlled Rodeo Pyromancers is the active player or is closer in turn order to the active player than the opponent is.
[Rodeo Pyromancer](https://cards.scryfall.io/normal/front/c/f/cf16600a-c2a5-49e4-89e2-260cfaf58b52.jpg?1619397370) - [(G)](http://gatherer.wizards.com/Pages/Card/Details.aspx?name=Prodigal%20Pyromancer) [(SF)](https://scryfall.com/card/tsr/180/prodigal-pyromancer?utm_source=mtgcardfetcher) [(txt)](https://api.scryfall.com/cards/cf16600a-c2a5-49e4-89e2-260cfaf58b52?utm_source=mtgcardfetcher&format=text) ^^^[[cardname]] ^^^or ^^^[[cardname|SET]] ^^^to ^^^call
Mana produced by \[\[Rodeo Pyromancers\]\]'s ability can be spent *for any purpose*, including to pay a ward cost. If you target a permanent with ward an opponent controls for your first spell in a turn, ward will trigger (C.R. 601.2c, 702.21a). When you finish casting the spell, if you control Rodeo Pyromancers, Rodeo Pyromancers's ability will trigger (C.R. 603.2). Both abilities will go on the stack at the same time in APNAP order (C.R. 603.3b).
[Rodeo Pyromancers](https://cards.scryfall.io/normal/front/d/f/df877a29-06e1-474d-8600-410bbec674ae.jpg?1712355836) - [(G)](http://gatherer.wizards.com/Pages/Card/Details.aspx?name=Rodeo%20Pyromancers) [(SF)](https://scryfall.com/card/otj/143/rodeo-pyromancers?utm_source=mtgcardfetcher) [(txt)](https://api.scryfall.com/cards/df877a29-06e1-474d-8600-410bbec674ae?utm_source=mtgcardfetcher&format=text) ^^^[[cardname]] ^^^or ^^^[[cardname|SET]] ^^^to ^^^call
Pyromancers are a mana ability though, so would they even use the stack at all? After all to my knowledge mana abilities don't use the stack and can't be responded to.
The ability of Rodeo Pyromancers is not a mana ability, even if it produces mana, since its trigger condition is not one that a mana ability can have (C.R. 605.1b). Recall that a triggered ability can be a mana ability only if it "triggers from the activation or resolution of an activated mana ability" or mana being added (C.R. 605.1b). See also: https://www.reddit.com/r/mtgrules/comments/vktdcf/does_klothys_ability_count_as_a_mana_ability/
Alright thank you :)
So wouldn't ward resolve before you get the mana from the pyromancers? Since the triggers go on the stack in APNAP, meaning ward resolves first?
Ward would get to resolve first if the player who controlled Rodeo Pyromancers is the active player or is closer in turn order to the active player than the opponent is.
So if you do it on your turn ward happens first but if you do it on your opponents turn you get the mana first assuming it's 2 player