M:tG card similarity search
4 · Artifact
Serrated Arrows enters the battlefield with three arrowhead counters on it. At the beginning of your upkeep, if there are no arrowhead counters on Serrated Arrows, sacrifice it. {T}, Remove an arrowhead counter from Serrated Arrows: Put a -1/-1 counter on target creature.
| Name | Mana | Type | Text | 
|---|---|---|---|
| Bog Elemental | 3BB | Creature — Elemental | Protection from white At the beginning of your upkeep, sacrifice Bog Elemental unless you sacrifice a land. 5/4 | 
| Wild Leotau | 2GG | Creature — Cat | At the beginning of your upkeep, sacrifice Wild Leotau unless you pay {G}. 5/4 | 
| Autonomous Assembler | 5 | Artifact Creature — Assembly-Worker | Prototype {1}{W} — 2/2 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) Vigilance {1}, {T}: Put a +1/+1 counter on target Assembly-Worker you control. 4/5 | 
| Indulgent Aristocrat | B | Creature — Vampire Noble | Lifelink {2}, Sacrifice a creature: Put a +1/+1 counter on each Vampire you control. 1/1 | 
| Phantom Nishoba | 5GW | Creature — Cat Beast Spirit | Trample Phantom Nishoba enters the battlefield with seven +1/+1 counters on it. Whenever Phantom Nishoba deals damage, you gain that much life. If damage would be dealt to Phantom Nishoba, prevent that damage. Remove a +1/+1 counter from Phantom Nishoba. 0/0 | 
| Rock Hydra | XRR | Creature — Hydra | Rock Hydra enters the battlefield with X +1/+1 counters on it. For each 1 damage that would be dealt to Rock Hydra, if it has a +1/+1 counter on it, remove a +1/+1 counter from it and prevent that 1 damage. {R}: Prevent the next 1 damage that would be dealt to Rock Hydra this turn. {R}{R}{R}: Put a +1/+1 counter on Rock Hydra. Activate only during your upkeep. 0/0 | 
| War-Wing Siren | 2U | Creature — Siren Soldier | Flying Heroic — Whenever you cast a spell that targets War-Wing Siren, put a +1/+1 counter on War-Wing Siren. 1/3 | 
| Family's Favor | 2G | Enchantment | Whenever you attack, put a shield counter on target attacking creature. Until end of turn, it gains "Whenever this creature deals combat damage to a player, remove a shield counter from it. If you do, draw a card." (If a creature with a shield counter on it would be dealt damage or destroyed, remove a shield counter from it instead.) | 
| Cloistered Youth | 1W | Creature — Human | At the beginning of your upkeep, you may transform Cloistered Youth. 1/1 | 
| Blood Aspirant | 1R | Creature — Satyr Berserker | Whenever you sacrifice a permanent, put a +1/+1 counter on Blood Aspirant. {1}{R}, {T}, Sacrifice a creature or enchantment: Blood Aspirant deals 1 damage to target creature. That creature can't block this turn. 1/1 |