mtg how adventure cards work layout:adventure · Scryfall Magic: The Gathering Search DDR#656 - How does Adventure

And if you ask me

"Catch me if you can."

Halfdane Rarity: Rare TYPE: Legendary Creature SUBTYPE: Shapeshifter CMC: 4 Mana cost: USD: $33.22 EUR: 27.63 TIX: 0.00 EDHREC RANK: 27827 (3/3) At the beginning of your upkeep, change Halfdane's base power and toughness to the power and toughness of target creature other than Halfdane until the end of your next upkeep

For example, when Emrakul, the Aeons Torn enters the graveyard, its triggered ability goes onto the stack then shuffles your graveyard into your library

Theres no major TCG on the market right now that allows you to play alone or co-operatively against the game itself