Knight-Errant of Eos [March of the Machine]Set: March of the Machine Type: Creature Human Knight Rarity: Rare Cost: {4}{W} Convoke When Knight Errant of Eos enters the battlefield, look at the top six cards of your library. You may reveal up to two creature cards with mana value X or less from among them, where X is the number of creatures that convoked Knight Errant of Eos. Put the revealed cards into your hand, then shuffle.

not to keep

Set: Ravnica Allegiance Promos Type: Legendary Creature — Human Shaman Rarity: Rare Cost: {1}{B}{R} Other creatures you control get +1/+0

Set: Kamigawa: Neon Dynasty Type: Basic Land — Swamp Rarity: Common ({T}: Add {B}

Set: International Collectors' Edition Type: Artifact Rarity: Rare Cost: {3} {3}

Some machines refuse to accept their own obsolescence

pay 4 life or put the card on top of your library

Set: Zendikar Type: Creature — Specter Rarity: Rare Cost: {2}{B}{B} Flying

Set: Gatecrash Type: Creature — Human Warrior Rarity: Rare Cost: {1}{R/G}{R/G}{R/G} Whenever Rubblebelt Raiders attacks

As the great scourge passed by

Set: Amonkhet Type: Creature — Jackal Warrior Rarity: Rare Cost: {3}{G} You may exert Champion of Rhonas as it attacks

Set: McDonald's Promos: 2016 Collection Type: Colorless Rarity: Promo Retreat cost: Colorless

Set: Aether Revolt Type: Sorcery Rarity: Rare Cost: {1}{R}{R} Gain control of target creature or Vehicle until end of turn