Flashback allows you to cast instant and sorcery spells from your graveyard for their flashback cost, letting you experience their effects once again
Biotech Specialist applies the pressure of ramping into big threats and the pressure of damage from artifact sacrifices
(It's an artifact with ", , Discard a card, Sacrifice this token: Draw a card.") Lifelink Whenever a creature an opponent controls dies, you gain 1 life and create a Blood token
At 1 CMC, it gives a creature +2/+0, a +1/+1 counter, and trample
If you can take the monetary hit while its going for a relatively smaller amount of money in comparison to some of the other rare cards in rotation, snap one up if circumstances allow.
It doesn't matter if its your opponent's turn, a sorcery, or a permanent