Tras'tath, Soul Parasite

Identity: A late-blooming hero who locks in a Tier 5 Dark Gift minion at the start and unlocks it on Turn 7.

Profile

Trait: “Void Power” Discovers a Tier 5 minion with a Dark Gift at the start of the game and holds it in hand, locked until Turn 7. The Discover uses an exclusive gift pool that ignores the normal turn-based tier table. This hero starts with 15 Armor.
Mechanics: For the first six turns the Hero Power provides nothing, but on Turn 7 it can put a Tier 5 gifted minion on the board; if it doesn’t fit, it can be sold for Gold once unlocked.

Early game: Play a normal curve for six turns — 15 Armor lets you develop safely. Don’t empty board slots or over-level in anticipation of the Turn 7 minion.
Key turns: Plan your direction at the opening Discover. Favor Tier 5 minions that are strong standalone or that combo with common cores; the gift is random, so offensive gifts such as start-of-combat stats, Poisonous, or Divine Shield plus Windfury raise its value a lot.
Mid to late game: Evaluate immediately on Turn 7: build around it if it fits, or sell it for Gold and treat it as a bridge if it doesn’t. Then return to a normal level-and-roll plan rather than forcing the comp around one card.

You see and lock a Tier 5 gifted minion at the start, so you can plan your comp around it early, and it plugs the mid-game power gap when it arrives.
15 Armor makes the blank early game forgiving, so you can hold a standard curve until the unlock.

No Hero Power value until Turn 7; snowballing opponents can put you under heavy pressure first.
You pick before seeing your shops, so both the minion and the gift can miss your final comp, making the payoff volatile.