M:tG card similarity search
2BB · Creature — Spirit
At the beginning of your upkeep, put a -1/-1 counter on each creature. 2/3
| Name | Mana | Type | Text | 
|---|---|---|---|
| Chlorophant | GGG | Creature — Elemental | At the beginning of your upkeep, you may put a +1/+1 counter on Chlorophant. Threshold — As long as seven or more cards are in your graveyard, Chlorophant has "At the beginning of your upkeep, you may put another +1/+1 counter on Chlorophant." 1/1 | 
| Mind Unbound | 4UU | Enchantment | At the beginning of your upkeep, put a lore counter on Mind Unbound, then draw a card for each lore counter on Mind Unbound. | 
| Matopi Golem | 5 | Artifact Creature — Golem | {1}: Regenerate Matopi Golem. When it regenerates this way, put a -1/-1 counter on it. 3/3 | 
| Serrated Biskelion | 3 | Artifact Creature — Construct | {T}: Put a -1/-1 counter on Serrated Biskelion and a -1/-1 counter on target creature. 2/2 | 
| Ring of Valkas | 2 | Artifact — Equipment | Equipped creature has haste. (It can attack and {T} no matter when it came under your control.) At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's red. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) | 
| Near-Death Experience | 2WWW | Enchantment | At the beginning of your upkeep, if you have exactly 1 life, you win the game. | 
| Festering Wound | 1B | Enchantment — Aura | Enchant creature At the beginning of your upkeep, you may put an infection counter on Festering Wound. At the beginning of the upkeep of enchanted creature's controller, Festering Wound deals X damage to that player, where X is the number of infection counters on Festering Wound. | 
| Kros, Defense Contractor | 1GWU | Legendary Creature — Cat Advisor | At the beginning of your upkeep, put a shield counter on target creature an opponent controls. Whenever you put one or more counters on a creature you don't control, tap that creature and goad it. It gains trample until your next turn. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.) 2/4 | 
| Ring of Kalonia | 2 | Artifact — Equipment | Equipped creature has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.) At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's green. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) | 
| Erhnam Djinn | 3G | Creature — Djinn | At the beginning of your upkeep, target non-Wall creature an opponent controls gains forestwalk until your next upkeep. (It can't be blocked as long as defending player controls a Forest.) 4/5 |