User blog comment:Poisonshark/PS's ideas on classes 2: Ability kits/@comment-8506165-20140821135716

"Healing/Shielding allies: Every support, even secondary, has several abilites that behave so."

Actually, no. If you mean going by Riot's tags, then Ashe and Anivia both have Secondary: Support and have no abilities that directly assist allies at all. And they're just the first two in the alphabet. As for champs that are actually played as botlane supports... Annie and Zyra, just off the top of my head.

Most supports have such an ability, yes. But not all.