If that Digimon has a special ability that states 'When this card makes its appearance', they are activated immediately after the card makes its appearance (the person second to attack will activate this ability first, before the person first to attack makes their Digimon appear)
Darkrai EX and Mega Absol EX are a formidable duo, and this couple is bound to give nightmares to the strongest decks
However, as Luna and Leo were taken by Trudge to the controller where Devack was, she was instead transported back to the Minus World in order to free Ancient Fairy Dragon
Its a versatile damage spell that can take care of an artifact or enchantment if needed
Most Pendullum monsters also have a pendullum effect which may be activated while they are in the Pendullum Zone this effect is treated as a spell effect
Ash Blossom & Joyous Spring There isnt a single deck in modern Yu-Gi-Oh that isnt main-decking a playset of this card and its easy to see why