[RPG] Can a Spell with “Self” Range be Cast by Homunculus Servant

Distant spell says:

Whenever you cast a spell that has a range of 5 feet or greater, you can...double the range of the spell.

Distant spell cannot be applied to burning hands

Burning hands has a range of Self. Self is not a number that is 5 feet or greater, therefore you cannot apply Distant Spell to it.

Note that Touch and Self are not the same range. Touch can be applied to any creature upon contact but self only affects the caster.

Jeremy Crawford supports this exact case with a ruling on Twitter:

Distant Spell works only on spells that have a range of 5 feet or greater or a range of touch. That doesn't include spells with a range of self.

Aganazzar's scorcher has its range doubled but not its area

Aganazzar's scorcher has a range of 30 feet. When distant spell is applied to it it will double to 60 feet.

However, it seems that the range does not have any applicability to the spell's effects. Since the line of fire emanates from the caster it seems there is nothing for the range to actually refer to. As written, the spell operates identically to a "Self (30ft line)" spell and perhaps was intended to be written as such.

Regardless, as written, the range would double to 60 feet, but it would have no effect on the length of the line because there is no indication that the two are linked in any way.

Jeremy Crawford seems to support this opinion indirectly via Twitter:

Q: Metamagic Dista[nt] Spell = Sunbeam range increases from 60 ft line to 120 ft line for duration of concentration?

A: Distant Spell can change the range of a spell, not the size of an area of effect created by the spell.

No, counterspell must target the caster casting the spell to be countered, not the familiar through which the spell would be delivered.

The description of find familiar says "your familiar can deliver the spell as if it had cast the spell." The key words here are "as if." The familiar is delivering the spell "as if" it had cast the spell, but that does not mean it actually cast the spell.

Examining the core rulebooks reveals that the designers consistently use "as if" to signal rules of like treatment, not identicalness. For example:

• The darkvision trait permits you to "see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light." (See, e.g., PHB p. 20.) The point is that, for purposes of vision, you receive the treatment you would receive in better lighting -- but the lighting conditions themselves don't change.
• The description of an animated shield says "The shield leaps into the air and hovers in your space to protect you as if you were wielding it, leaving your hands free." In other words, with respect to handedness, you receive the treatment you would receive if you were not wielding the shield: you get to have both hands free to do something else, like wielding a two-handed weapon.
• Within the extraplanar paradise created by a rod of security, each hour "a visitor regains hit points as if it had spent 1 Hit Die" -- but doesn't actually spend a Hit Die. When the visitor leaves, she still has the Hit Dice she came in with. (If it were not so, the value of a rod of security would be rather reduced, since anyone could spend a Hit Die normally by taking a short rest in the same one hour.)

By the same logic, for purposes of delivering the spell your familiar receives the treatment it would receive if it had cast the spell, but it has not actually cast the spell. Counterspell therefore would not be effective if it targeted the familiar rather than you.