/Nature bloom question

[SuperPlyx]

So pretty sure I am overlooking something obvious, but looking at Mid's Corr /nature affinity and I see lot of powers the give stacks of Bloom. But I am not seeing what uses the stack of Bloom.   

[BZRKR]

According to : https://hcwiki.cityofheroes.dev/wiki/Nature_Affinity

"You have command over the forces of nature and are able to call forth primal energies to aid your allies and hinder your foes. Many of your powers place a Bloom effect on you and your allies. Each stack of Bloom boosts healing effects on the affected targets by 4% for 30 seconds. Bloom can stack up to 5 times."

 

Bloom isn't a combo build/spend mechanic. It's a stacking buff.

 

 

[Tantricsecrets]

Also when you put the bloom effect on another support character that has a heal, bloom increases their heal effectiveness for each stack they have on them.

[SuperPlyx]

Ok, thank you . that makes sense. I am just used to the build/spend mechanic from other ATs.