For both triggered abilities, it doesn't matter what happens to the attacking creatures in response
I would probably take it higher than something like Chrome Mox in a pack, and its a card that I tend to see underused in cubes that allow Un-cards
The best example of this is a story I always tell about a Zur's Weirding deck I used for gunslinging
To start with, every color has a solid three-toughness common creature for two mana, but only white and red have two-drops with three power to punch through those and only one each
Valiant Veteran Valiant Veteran is a new white 2-drop soldier that acts as a lord for soldiers, and lets you distribute +1/+1 counters to all of your soldiers if you pay five mana and exile it from your graveyard
Overprotect Overprotect has a little bit of keyword soup going on, but this makes it a very strong card for only a couple of mana