Big Ol Bag Of Synergy
The idea of this deck is to completely outlast your opponents with lifegain and a board that gets bigger and bigger as the game drags on (Which I really think goes with the philosophy of Abzan).
Corpsejack Menace really ties the deck together, it makes all of your +1+1 abilities insane.
Putting counters on the High Priest of Penance makes a huge threat, and even without the counters it delays your opponents attackers early game.
Ghave, Guru of Spores is just great for doing stuff in stalemates, idle turns or when you topdeck a land, if you have one or more of Corpsejack Menace out then you will start making net positive +1+1 counters by spamming his 2 abilities to give you tokens or +1+1 counters.
Phytohydra is obviously insane by itself but with the Corpsejack Menace and/or Ghave, Guru of Spores you can make loads of tokens or a huge creature that's hard to deal with.
Vish Kal, Blood Arbiter Sacrifice a Siege Rhino or an Armament Corps to get a huge lifelink flyer. Then if you have Sheoldred, Whispering One out you can use the entry ability, Siege Rhino 6 point lifeswing and such, then rinse and repeat.
Whip of Erebos just makes your big boys, like Phytohydra way more usefull (swinging for 50 lifelink every turn usually puts the game out of reach).
Then you have some standard B/W control shenanigans with Castigate to PERMANENTLY remove threats from your opponents hand. And Mortify+Putrefy to get rid of annoying garbage.
The rest is just to help the +1+1 counters and life swings.
*This can also be used in modern with a few slight changes that don't really alter the deck in significant ways.
