DND_Reborn
The High Aldwin
Oh, sure, with that feat you have to be the only target (such as Disintegrate), but the only times you aren't (that I can think of anyway) are AoE spells and those you can take no damage from if you make the save (or of like Evasion, but costs your reaction).Shield master only applies if the PC is the only target. The only way that makes sense if it's a dex save for something that has only a single target, so it almost never happens.
At least that's how I interpret it because it doesn't make sense if you get a bonus if you happen to be the only target of a fireball but not if someone else happens to be standing 20 feet away and also in the fireball.
Oh well, hardly the only issue I have with that feat.
I remember for a while we had a house-rule for Defensive Fighting Style that you could use your reaction to take half damage from a weapon attack when you were wearing your armor. Not quite as good as Uncanny Dodge, but along those lines.