M:tG card similarity search
3U · Creature — Human Knight
When Protocol Knight enters the battlefield, tap target creature an opponent controls. Put a stun counter on that creature if you control another Knight. (If a permanent with a stun counter would become untapped, remove one from it instead.) 3/4
| Name | Mana | Type | Text | 
|---|---|---|---|
| Authority of the Consuls | W | Enchantment | Creatures your opponents control enter the battlefield tapped. Whenever a creature enters the battlefield under an opponent's control, you gain 1 life. | 
| Topplegeist | W | Creature — Spirit | Flying When Topplegeist enters the battlefield, tap target creature an opponent controls. Delirium — At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, tap target creature that player controls. 1/1 | 
| Githzerai Monk | 4W | Creature — Gith Monk | Flash Flying Psychic Defense — When Githzerai Monk enters the battlefield, tap all creatures you don't control. 3/2 | 
| Isperia's Skywatch | 5U | Creature — Vedalken Knight | Flying When Isperia's Skywatch enters the battlefield, detain target creature an opponent controls. (Until your next turn, that creature can't attack or block and its activated abilities can't be activated.) 3/3 | 
| Gulf Squid | 3U | Creature — Squid Beast | When Gulf Squid enters the battlefield, tap all lands target player controls. 2/2 | 
| Glaring Aegis | W | Enchantment — Aura | Enchant creature When Glaring Aegis enters the battlefield, tap target creature an opponent controls. Enchanted creature gets +1/+3. | 
| Ancient Animus | 1G | Instant | Put a +1/+1 counter on target creature you control if it's legendary. Then it fights target creature an opponent controls. (Each deals damage equal to its power to the other.) | 
| Bond of Discipline | 4W | Sorcery | Tap all creatures your opponents control. Creatures you control gain lifelink until end of turn. | 
| Thoughtweft Gambit | 4W/UW/U | Instant | Tap all creatures your opponents control and untap all creatures you control. | 
| Fight | 3G | Sorcery | Aftermath (Cast this spell only from your graveyard. Then exile it.) Target creature you control fights target creature an opponent controls. |