CotW Contest #520: Double Trouble: Cardbuilding edition

Wandering Mugician
Creature - Spirit
, : Invoke target creature you control. (Create a copy of that card's Invocation spell. You may cast the copy.)
1/1
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Mugical Secret
Sorcery - Invocation
Add one mana of any color. (Then put this card in your graveyard.)
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Explanation:

Invocation is a subtype for Instant and Sorcery spells that has similarities with Adventure. A card with an Invocation can be cast as either the main card or as its Invocation, but unlike Adventures, an Invocation spell is put into the graveyard when it resolves, so you don't get the permanent spell later. However, the "invoke" action will let you cast Invocations without losing the card.

When you "invoke" a card, you create a copy of that card's Invocation spell, which you may then immediately cast. You still pay the mana cost of the copy unless the invoking effect says otherwise. The original card stays where it is; if it's a permanent on the battlefield, it never leaves the battlefield, and likewise for whatever other zone the card might be in.

A token copy of a card with an Invocation has that Invocation as well and can be invoked. If you try to Invoke a card that doesn't have an Invocation, the ability doesn't create any copies and nothing happens. If a card somehow has more than one Invocation, you create copies of each Invocation spell and may cast any number of those copies.

An Invocation is a spell, while "invoking" can come from anything, spell, activated or triggered ability, etc. Effects that counter activated or triggered abilities won't counter the Invocation spell, but will likely be able to counter the ability that would invoke them. You don't spend mana on the spell copy until you cast it, so if the invoking effect is countered or otherwise is unable to resolve, you don't get the opportunity to spend mana on the spell.

(If anyone has feedback, I'd love to hear it. I just thought this mechanic would make for the perfect entry for this contest)

Glen Elendra Gatewardens 
Creature--Faerie Soldier
Flash
Flying
Whenever you cast a spell with mana value of 6 or greater, you may transform Glen Elendra Gatewardens.
2/3
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Oona's Royal Guard
Creature--Faerie Soldier Rogue
Flying
At the beginning of your upkeep, you lose 1 life and create a 1/1 black Faerie Rogue creature token with flying.
Oona’s Royal Guard’s power and toughness are each equal to the number of Faerie permanents you control.
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lightpaws

„Exile“ from where exactly;-)

It's a whole text of an instant, so you need to resolve this too, so, exile from stack of course.