This deck applies pressure after ramping up mana in the
early game. Harrow and Elder double as land-thinners as well
as searchers. Armadillo Cloak and Fetters help to gain life
and to keep pounding. Moldervine Cloak and Rancor make sure
the elves are useful in the mid-game. Reprisal and Fetters
can help deal with mid-game threats your opponent puts down.
The Cloaks make the Phantom Centaur indestructable through
damage. This makes him extremely hard to get rid of outside
of someone playing white. Black can't target him and Edict
won't work most of the time since you have other creatures.
River Boa and Elder makes good Rancor Targets besides elves.
The deck seems to work fairly well. If you don't see many
beatdown decks, then you can replace Reprisal with something
Fetters can buy you enough time to win the game, can remove
a potential blocker for the win, and can stop annoying cards
with activation costs.
Typical games go:
Turn 1: Land, Elf
Turn 2: Land, Harrow, River Boa
Turn 3: swing (no need for regen), Blastoderm