MTG Salvation

I have a meren deck where the main feature of is sacrificing where I sacrifice my creature to gain power and force my opponents to sacrifice their creatures. It also has a bit of tokens for secondary tactic.

What are some good win conditions for my deck?

A few big creatures with fear/intimidate can help you take wins. So can effects like Blood Artist and Falkenrath Noble which damage opponents when thing die. Extort works well with those sorts of strategies. Really, though, Meren - and most graveyard generals - are all about card advantage. That's your greatest wincon.

Just make sure to pack lots of removal, and especially some of green's excellent artifact and enchantment removal, because otherwise your deck is likely to just fold to things like Rest in Peace and Leyline of the Void, or generals like Anafenza. Don't make the mistake of making all your removal be creature-based, either, or you are vulnerable to things like Torpor Orb.

Time is your win condition, grinding things out with a steady stream of value creatures and solid board control.

Personally, I too do an even mix of sacrificial shenanigans (Attrition etc.) and token production, giving me plenty of meat to throw into the grinder and blockers to get in the way, all while building up for an inevitable Overrun effect or just straight up grinding the opponents boards into dust with Grave Pact and friends while tokens plink away.

If you want to talk about simple common finishers, Avenger of Zendikar backed up by literally any overrun effect will get you there more often then not, especially if you can recur the Avenger.

Opponents getting annoyed with you and leaving the table to go play smash bros is your win con.

That or just clear out their board with Grave Pact and any whatever random dudes you got kicking around finish the job. Terrastadon and Woodfall Primus are good fatties that would work in this kind of deck.

I've previously won by looping something like Gray Merchant of Asphodel or Kokusho, the Evening Star. Pulling out of other people's graveyards (e.g. Sepulchral Primordial can also net you some bombs to potentially close out the game.

My son's Meren deck was having a similar identity crisis. Able to control the board with Grave Pact like effects, but lacked mustard for a quick finish. He included Craterhoof Behemoth with token producers like Avenger, Hornet Queen, and Grave Titan. He also put in the Mike + Trike combo... where he can Birthing Pod or Tooth and Nail for the combo win. He has Grey Merchant too, but hasn't won with it yet.

I get wins with the good old Avenger of Zendikar + Craterhoof Behemoth (Life/Death is a particularly good version of the Craterhoof finish), flinging Phyrexian Devourer/Lord of Extinction with Jarad, Golgari Lich Lord (recur either pair with Victimize is always a good way to get them into play), or just smasheroos with big things that I've cheated into play from the graveyard.

Consider Gravecrawler + Phyrexian Altar + zombie to get Meren pumped up!