pokemon wizards of the coast booster box 1999 Pokémon 1st Edition Jungle Sealed in United States Product Description WOTC Vintage Sealed Pokémon (1999–2003)

It can be summoned by sending 2 Gadget cards from your hand or field to the GY, it cant be destroyed by battle or card effects while you control a Gadget, and you can destroy 1 card on the field each turn

During the End Phase of this turn, take 2300 damage if you did not Special Summon the revealed monster, or a monster with the same name, after you resolved this effect

You compare the power of both cards, the tracker will win if its power is greater than or equal to the defender and then the following happens

Without going too deep in the top-down design, the Mosswood Dreadknight is the sets take on the Arthurian legend of the Green Knight who, after being decapitated by Sir Gawain, rides away for the two to meet a year later hence the card coming back from the dead after a time