Serra Angel gets reprinted every few years in the new M:TG Core sets because of how great she is
Designed to hit hard with Heroes, I like the low casting cost of Captain America, as he'll likely be targeted often by your opponents
For example, Final Fantasy 14 's Emet-Selch can transform into Hades whenever the player has 14 or more cards in the graveyard
With Monstrous Rage flying around Standard, Manifold Mouse will do a lot of work
Nowadays, its played mostly to fight Crashing Footfalls and Living End due to the printing of Force of Negation and Shardless Agent, making cascade decks tier 1
Archangel of Thune is a powerful 3/4 flying creature with lifelink that gives all the player's creatures +1/+1 counters every time the player gains life, which is an extremely strong synergy