We actually can get 2 copies of Mercury already. The second one was from another pick-a-gift event.
Heck you can have 3 copies if you used the 5Ds world event ticket for another Mercury (but who does that when there are rarer cards to pick lol)
Let me guess, that Stardust has used its effect?
If it was Special Summoned from the Graveyard it no longer has any associated Synchro Materials, since the last summon that happen to it is not a Synchro Summon.
Similar rule also apply to Fusion monsters and its Fusion Materials.
Works well in a Junk Warrior focused deck since it has pretty high attack for a level 2.
It's effect is also very usefull in combination with junk synchron and a third level 2 monster on the field
Field:
Junk synchron, Sonic warrior, a level 2
Synchro summmon Junk and Sonic
Remaining level2 gets a 500atk boost --> Junk warrior gets a 500 atk boost
Also a good option for milling or discarding as it's effect wil activate regardless
We've had Eternal Rest, a Spell version, when NK was still new.
Nobody used Eternal Rest.
What makes you think anyone will bother to use a slower Trap version?
Droprate for this event was absolutely horrible. I got Horn and Edge, but only one copy of each. To add @@@ to injury, I got two copies of Keel and Three copies of Claw.
You need a spell/trap to trigger. The spell/trap *must not* read:
"destroy, then"
or you will miss the timing, it should read:"destroy and"
Traps like Trap hole will miss there timing if they are part of a chain. (Chain resolves timing is missed (the hamster will not miss this timing)) unless they start the chain
Tributing is a miss timing since after minion is destroyed, you *then* tribute summon.
Summoning a set flip summoning card is pretty OP and can even validate the use of traps like "Opss" which reads; destroy a minion you control. (What an absurdly bad card)
Your 1 block now blocks 2 attacks, you thin your deck, and line your graveyard. Since its a trap, you can activated it at the end of your opponents turn, so you can flip it your self. Allowing you to tribute summon a lvl 5 or 6, to enable a synchro summon of stardust dragon or diagusto, which will again. Line your graveyard.
"except this card", so it is only referring to itself, and not all copies of itself.
That means you can control 2 of this card and have both boosting each other's ATK.