M:tG card similarity search
2R · Legendary Artifact
When Brass's Tunnel-Grinder enters the battlefield, discard any number of cards, then draw that many cards plus one. At the beginning of your end step, if you descended this turn, put a bore counter on Brass's Tunnel-Grinder. Then if there are three or more bore counters on it, remove those counters and transform it. (You descended if a permanent card was put into your graveyard from anywhere.)
| Name | Mana | Type | Text | 
|---|---|---|---|
| Bulette | 3G | Creature — Beast | At the beginning of your end step, if a creature died this turn, put a +1/+1 counter on Bulette. 3/3 | 
| Bold Plagiarist | 3B | Creature — Vampire Rogue | Flash Whenever an opponent puts one or more counters on a creature they control, they put the same number and kind of counters on Bold Plagiarist. 2/2 | 
| Boot Nipper | 1B | Creature — Beast | Boot Nipper enters the battlefield with your choice of a deathtouch counter or a lifelink counter on it. 2/1 | 
| Vashta Nerada | 2B | Creature — Alien Horror | Indestructible Shadow (This creature can block or be blocked by only creatures with shadow.) Morbid — At the beginning of each end step, if a creature died this turn, put a +1/+1 counter on Vashta Nerada. 1/1 | 
| Khabál Ghoul | 2B | Creature — Zombie | At the beginning of each end step, put a +1/+1 counter on Khabál Ghoul for each creature that died this turn. 1/1 | 
| Armageddon Clock | 6 | Artifact | At the beginning of your upkeep, put a doom counter on Armageddon Clock. At the beginning of your draw step, Armageddon Clock deals damage equal to the number of doom counters on it to each player. {4}: Remove a doom counter from Armageddon Clock. Any player may activate this ability but only during any upkeep step. | 
| Geology Enthusiast | 3UU | Creature — Human Artificer | At the beginning of your end step, create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.") {6}: Draw a card and put a +1/+1 counter on Geology Enthusiast. 2/5 | 
| Mana Cache | 1RR | Enchantment | At the beginning of each player's end step, put a charge counter on Mana Cache for each untapped land that player controls. Remove a charge counter from Mana Cache: Add {C}. Any player may activate this ability but only during their turn before the end step. | 
| Necroplasm | 1BB | Creature — Ooze | At the beginning of your upkeep, put a +1/+1 counter on Necroplasm. At the beginning of your end step, destroy each creature with mana value equal to the number of +1/+1 counters on Necroplasm. Dredge 2 (If you would draw a card, you may mill two cards instead. If you do, return this card from your graveyard to your hand.) 1/1 | 
| Savage Gorger | 1BB | Creature — Vampire | Flying At the beginning of your end step, if an opponent lost life this turn, put a +1/+1 counter on Savage Gorger. (Damage causes loss of life.) 1/1 |