Reinforce rules

[Quackmaster5]

I had a friend attack swing with everything and try and wipe me out. I was able to block all but one and that one creature wouldn't have been able to kill me. He played {swell of courage} for its reinforce ability as if it was an instant ability. I wasn't sure how reinforce worked and couldnt find it in the rules when reinforce ability can be played. Can someone help me out for the future?

[BadLuckIrish]

The reinforce ability is an instant speed since Swell is an instant. If swell was a socery then then its at sorcery speed.

[Wally]

Nevermind I re-read it.
It's similar to cycling.

[Quackmaster5]

Right, but can you cycle in the middle of combat? It thought that would be sort of a sorcery ability.

[BlackJester]

All activated abilities are instant-speed unless stated otherwise.