I have built a Satyr and Centaur ramp deck that works on the heroic ability to boost counters with instant spells. I would like to know how Solidarity of Heroes would effect this ability as it states:
Choose any number of target creatures. Double the amount of +1/+1 counters on each of them.
My gut instinct would be that I control both the heroic ability and the effect that is placed on the stack by Solidarity of Heroes so I could choose which happens first.
So essentially could I target a Setessan Oathsworn with Solidarity, put two +1 counters on Oath with the heroic ability, then double the counters with Solidarity?
My confusion lies with when Setessan is being targeted by the spell to double the counters that puts the heroic ability on the stack, then the spell resolves putting Solidarity on the stack which means it would possibly resolve first doubling zero counters...