Can Petal rescue bring back a unit from trash?

Ruling: No, Petal rescue cannot bring back a unit from trash. "Unit" refers to objects on the board unless specified otherwise, and the card does not specify a zone like "from your trash."

Sequence:

• When a card says "friendly unit" without specifying a zone, it refers only to units on the board
• Units in trash are treated as cards and cannot be affected by spells or abilities that target units on the board
• To target units in trash, the card text must explicitly specify the zone (e.g., "from your trash")

Nuances:

• Units retain the properties of being a unit while in trash, but are treated as cards similar to when in hand
• The term "unit" in card text defaults to units on the board per the targeting rules
• Actions like "Banish" can take cards from any zone, but the object being chosen ("a friendly unit") still must meet targeting requirements