Spoiler warning. This page gives away the puzzle from 26 September 2025. If you have not played it yet, try it first – five guesses, and it is still there.
The protective synchro dragon that sacrifices itself to negate destruction.
Type: Synchro Monster
Set: Collectible Tins 2008 Wave 1
CardMarket price: 0.51$
Text: 1 Tuner + 1+ non-Tuner monsters
When a card or effect is activated that would destroy a card(s) on the field (Quick Effect): You can Tribute this card; negate the activation, and if you do, destroy it. During the End Phase, if this effect was activated this turn (and was not negated): You can Special Summon this card from your GY.