The effect of the Xyz Agent in the original work is an effect that activates the effect of using the Xyz materials of the Xyz monster, not the use of Xyz materials, so if the Xyz Agent activates the effect of Utopia Ray V, whose effect is nullified, destroying Shining and inflicting 2700 damage to Vector, Vector, who had 1300 life remaining, is finished
Its also great in Commander, where it can be particularly spicy with Landfall Commanders, as there are few cards that can give you so many landfall triggers in a single turn
Roy: Correct
Make your own version with text, stickers, and a canvas sized for any platform
Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.) Once Deepfathom Echo becomes a copy of another creature, it no longer has its triggered ability until end of turn
This varies greatly depending on factors such as rarity, condition, and demand