mystery booster box mtg card list boosters contain 'The List' cards in Magic: The Gathering At the beginning of each players draw step Mystery Booster Revealed | MAGIC:

Bit rough clean up (trigger based): Once per turn, You can Pay 1000 LP: the 1st time you Special Summon a Level 5 or Higher Monster that can be Normal Summoned/Set after this effect resolved, that card is treated as if it was Tribute Summoned instead.

Heavy Metal Raiders X SPELL Field The first time each DARK Machine monster you control would be destroyed by battle each turn, it is not destroyed, and if you took battle damage from the battle, it gains that much ATK after damage calculation, and keeps that ATK gain while this card is on the field

To be more explicit: Anything before a colon " : " is the Condition you need to fulfil to activate this Effect

Fusion Strike TypePokmon Collector Number155 RarityCommon ArtistYuu Nishida The six of them work together as one Pokmon

This serves as a second summonable monster that doesnt require a normal summon, giving you even more fodder for Rikka tributes or for Xyz Summons