M:tG card similarity search
UUUU · Enchantment
Whenever an opponent casts a creature spell that doesn't share a color with a creature you control, counter that spell unless that player pays {X}, where X is its mana value.
| Name | Mana | Type | Text | 
|---|---|---|---|
| Esper Sentinel | W | Artifact Creature — Human Soldier | Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is Esper Sentinel's power. 1/1 | 
| Spell Rupture | 1U | Instant | Counter target spell unless its controller pays {X}, where X is the greatest power among creatures you control. | 
| Rhystic Study | 2U | Enchantment | Whenever an opponent casts a spell, you may draw a card unless that player pays {1}. | 
| Manaplasm | 2G | Creature — Ooze | Whenever you cast a spell, Manaplasm gets +X/+X until end of turn, where X is that spell's mana value. 1/1 | 
| Mindswipe | XUR | Instant | Counter target spell unless its controller pays {X}. Mindswipe deals X damage to that spell's controller. | 
| Spelltithe Enforcer | 3WW | Creature — Elephant Wizard | Whenever an opponent casts a spell, that player sacrifices a permanent unless they pay {1}. 3/3 | 
| Draining Whelk | 4UU | Creature — Illusion | Flash Flying When Draining Whelk enters the battlefield, counter target spell. Put X +1/+1 counters on Draining Whelk, where X is that spell's mana value. 1/1 | 
| Presence of the Master | 3W | Enchantment | Whenever a player casts an enchantment spell, counter it. | 
| Common Courtesy | 2UU | Enchantment | Whenever a player casts a spell without asking your permission while casting it, counter that spell. When a player asks you permission to cast a spell and you refuse, counter that spell and sacrifice Common Courtesy. | 
| Overwhelming Intellect | 4UU | Instant | Counter target creature spell. Draw cards equal to that spell's mana value. |