When casting Meditation by paying the additional cost of exhausting a friendly unit on Dreaming Tree, does the exhausted unit count as a target for Dreaming Tree's effect?

Ruling: Meditation does not target, and exhausting a friendly unit is an additional cost paid before resolution. You only draw 2 cards from Meditation, not 3.

Sequence:

• You exhaust the unit as you pay the additional cost before resolution
• After finalizing costs, the exhausted unit is not considered for Meditation's resolution
• Only the fact that you paid the cost matters, not the unit itself

Nuances:

• Additional costs are not the same as targets
• The exhausted unit does not interact with Dreaming Tree's effect because it is not targeted by the spell