Arcane Strike

You draw upon your arcane power to enhance your weapons with magical energy.

Prerequisite: Ability to cast arcane spells.

Benefit: As a swift action, you can imbue your weapons with a fraction of your power. For 1 round, your weapons deal +1 damage and are treated as magic for the purpose of overcoming damage reduction. For every five caster levels you possess, this bonus increases by +1, to a maximum of +5 at 20th level.

Will Variant multyclassing, Spell-like abilities or traits that grant spells qualify me for this feat.

Arcane Strike talks about using up a spell to power it. A spell-like ability is not a spell; a supernatural ability is not a spell

No it has to be an actual main arcane casting class.

The description is a rather vague one, so Here is some clarification

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