This is my Casual, unformat version, of my Temur Sacrifice Deck.
I wanted to include cards like Reef Worm.
Have Scourge of Skola Vale eat that over and over and gain +9/+9 counters and have another 9/9 creature put onto the field.
Both Twinflame and Polymorphous Rush are great when copying those Reef Worm tokens because before the end of the turn comes and you lose them you just tap and sac them to Scourge of Skola Vale and their next form comes out 3 > 6 > 9 and doesn't go away at end of turn. They just keep giving you more and more targets for Scourge to eat. And if he's big enough you can always sac them to Life's Legacy for a bunch of draws or Jalira to search for something.
Also Solemn Simulacrum is a good add. When it enters you get to search for land which is great ramp and allows you to pluck a red/green out whichever you have less of. When you sacrifice him to skola, jalira, life's legacy, or shrapnel blast and it dies you get to draw a card.
Maybe's
Write into Being and Wildcall are great because if the face-down creature has any counters on it, those remain on the face-up creature when you pay it's manifest cost. It's not a new creature, and it doesn't enter the battlefield just by turning face up. Turning a face-down creature face up doesn't use the stack and can't be responded to. Any Auras or Equipment attached to the manifested creature as well as any +1/+1 counters, remain attached to it after it turns face up.
So you could Wildcall into a Hooded Hydra on turn 4 say. It'll be a 2/2 with two counters for a 4/4. Now you pay the manifest cost according to H.H's converted mana cost of 2! (X=0 in CMC). Now it's a base 0/0 with the previous 2 counters + Hooded Hydras last ability is triggered. You put on 5 more counters making it a 7/7.
