If Gadrak is your commander then I'd recommend running a bunch of Threaten effects to steal opposing creatures and then sacrifice them to something like Ashnod's Altar
The fact that it actually gives you the option of Boggart Bog makes me strangely happy
Then you can activate Sundial of the Infinite before the end of that extra turn and avoid losing the game
Because of that, expect to see him see play in decks in which life-gain and exploding spells are both included, such as a R/W deck that runs Congregate and X-damage spells or to fuel a giant Exsanguinate in B/R that uses Kokusho-style cards
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Each The Lost Caverns of Ixalan Set Booster contains: 12 Magic: The Gathering cards per booster 1-4 cards of rarity Rare or higher in every pack 1 Art Card (foil-stamped Signature Art Card replaces the Art Card in 10% of Boosters) 3-7 Uncommon cards 3-7 Common cards 1 Land card (Traditional Foil in 20% of packs, Full-Art Land in 30% of Boosters) 1 Traditional Foil card 1 token/ad card, Helper card, or a special card from Magic's historyfound in 25% of packs