They have trample themselves, though theyre starting off at a measly 1/1 stat-wise
Theyre swift, inexpensive, and efficient
Though that combo isn't quick enough to make Enduring Tenacity more than a bit player in Standard, it's the kind of card that life-gain and life-drain decks in EDH love to play with, as it's effectively a second copy of Sanguine Bond (albeit cheaper and slightly more vulnerable to exile-based removal)
Ive won many Commander games because of Grand Abolisher
Blue Rares: Venser, Shaper Savant $9.99 Gifts Ungiven $3.99 Cyclonic Rift $3.99 Phantasmal Image $2.99 Deadeye Navigator $0.49 Cackling Counterpart $0.49 Venser is a great reprint
This shouldnt push you into mulliganing solid hands without countermagic, or keeping weak ones just because they have protection