Kill the Horse Fish!

[socraticirony]

{Adarkar Valkyrie} + {Extractor Demon} + {Breaching Hippocamp} + Free sac outlet

Tap {Adarkar Valkyrie}, targeting the Hippocamp. Then sacrifice him to the outlet of your choice. {Extractor Demon} triggers, then {Breaching Hippocamp} returns, untapping the Valkyrie. Rinse and repeat for insta-mill and a very, very dead Horse Fish.

[Brawler_1337]

And then you hit their {Emrakul, the Aeons Torn}.

FFFFFFFFFFFFFFFFFFFFFFFFFFFF-

[abstractApathist]

{Adarkar Valkyrie} + {Extractor Demon} + {Breaching Hippocamp} + Free sac outlet

Tap {Adarkar Valkyrie}, targeting the Hippocamp. Then sacrifice him to the outlet of your choice. {Extractor Demon} triggers, then {Breaching Hippocamp} returns, untapping the Valkyrie. Rinse and repeat for insta-mill and a very, very dead Horse Fish.

1. The flavor on this is beautiful since slaying the hippocamp was supposed to give you god-killing powers.

2. You could also use {Blood Artist} instead of {Extractor Demon}.

[socraticirony]

{Adarkar Valkyrie} + {Extractor Demon} + {Breaching Hippocamp} + Free sac outlet

Tap {Adarkar Valkyrie}, targeting the Hippocamp. Then sacrifice him to the outlet of your choice. {Extractor Demon} triggers, then {Breaching Hippocamp} returns, untapping the Valkyrie. Rinse and repeat for insta-mill and a very, very dead Horse Fish.

1. The flavor on this is beautiful since slaying the hippocamp was supposed to give you god-killing powers.

2. You could also use {Blood Artist} instead of {Extractor Demon}.

Really? I had no idea about the Hippocamp. That's actually really cool (more so 'cause it was unintentional )

And you're right, {Blood Artist} could be used to make the combo cheaper and more efficient, but I figured the Hippocamp deserved something special.

[Flashley_ska]

Don't forget the ETB effects: things like: {Sage's Row Denizen} for mill,  {Auriok Champion},  {Healer of the Pride}, {Soul Warden}, {Suture Priest} or {Soul's Attendant} for lifegain, or even {Goldnight Commander} or {Griffin Protector} for mega boost!

[griffin131]

Or {Cathar's Crusade} for +1/+1 counters that go on forever... On every creature.