There's nothing to justify this card's colors if it's played face-up. It's just outright bad. At the very least, this should have a body to justify that cost. By itself, it's a 3/4 vanilla in three colors. It's a terrible card if you can't pay the morph cost.
With that, the morph cost is split between dimir and golgari. The dimir isn't bad, but a 3/4 with a Sign in Blood for a total of 8 mana over two turns seems weak in the FIRE era (I'm not saying that's a good thing, just how the game seems now).
The golgari side is target forget sac which is good but just weird. Letting an creature indestructible creature make the golgari morph cost whiff is pretty reasonable. Otherwise, choosing a highest mana value, power, or toughness for the sacrifice probably works.
Why not harken back to Eventide and combine combine the morph cost and abilities with a hybrid cost?
Morph
"When ~ is turned face up, if was spent to pay for ~'s morph cost, target opponent sacrifices a creature with the highest mana value they control. You gain life equal to its power. If was spent to pay for ~'s morph cost, target player draws two cards and loses two life."
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I don't think this design is a bit weird.
There's nothing to justify this card's colors if it's played face-up. It's just outright bad. At the very least, this should have a body to justify that cost. By itself, it's a 3/4 vanilla in three colors. It's a terrible card if you can't pay the morph cost.
With that, the morph cost is split between dimir and golgari. The dimir isn't bad, but a 3/4 with a Sign in Blood for a total of 8 mana over two turns seems weak in the FIRE era (I'm not saying that's a good thing, just how the game seems now).
The golgari side is target forget sac which is good but just weird. Letting an creature indestructible creature make the golgari morph cost whiff is pretty reasonable. Otherwise, choosing a highest mana value, power, or toughness for the sacrifice probably works.
Why not harken back to Eventide and combine combine the morph cost and abilities with a hybrid cost?
Morph

"When ~ is turned face up, if
was spent to pay for ~'s morph cost, target opponent sacrifices a creature with the highest mana value they control. You gain life equal to its power. If
was spent to pay for ~'s morph cost, target player draws two cards and loses two life."
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Temur, Clan of Savagery
Source
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Probably swap front and back.
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Probably swap front and back.
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Probably swap front and back.
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Probably swap front and back.
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Probably swap front and back.
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