Dubious Challenge [Kaladesh Prerelease Promos] 2018 Mega-Tins Mega Pack you may search your library

you may search your library for up to three basic land cards

Set: Dark Revelation Volume 2 Card type: Normal Trap Rarity: Rare Attack: 0 Defense: 0 Negate the attack of 1 of your opponent's monsters and increase your Life Points by an amount equal to the attacking monster's ATK

you can Set 1 "Infinite Machine" directly from your hand or Deck

Set: 2018 Mega-Tins Card type: Synchro/Effect Monster Rarity: Ultra Rare Attack: 2100 Defense: 1200 1 Tuner + 1+ non-Tuner monsters When this card is Synchro Summoned while you control no other monsters: You can target 1 "Junk" monster in your GY

• At the start of the Damage Step

Dubious Challenge [Kaladesh Prerelease Promos] 2018 Mega-Tins Mega Pack you may search your librarySet: Kaladesh Prerelease Promos Type: Sorcery Rarity: Rare Cost: {3}{G} Look at the top ten cards of your library, exile up to two creature cards from among them, then shuffle. Target opponent may choose one of the exiled cards and put it onto the battlefield under their control. Put the rest onto the battlefield under your control.