M:tG card similarity search
2U · Enchantment Creature — Nautilus
Bestow {3}{U}{U} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) When Crystalline Nautilus becomes the target of a spell or ability, sacrifice it. Enchanted creature gets +4/+4 and has "When this creature becomes the target of a spell or ability, sacrifice it." 4/4
| Name | Mana | Type | Text | 
|---|---|---|---|
| Makeshift Mannequin | 3B | Instant | Return target creature card from your graveyard to the battlefield with a mannequin counter on it. For as long as that creature has a mannequin counter on it, it has "When this creature becomes the target of a spell or ability, sacrifice it." | 
| Mossdog | G | Creature — Plant Dog | Whenever Mossdog becomes the target of a spell or ability an opponent controls, put a +1/+1 counter on Mossdog. 1/1 | 
| Phantasmal Image | 1U | Creature — Illusion | You may have Phantasmal Image enter the battlefield as a copy of any creature on the battlefield, except it's an Illusion in addition to its other types and it has "When this creature becomes the target of a spell or ability, sacrifice it." 0/0 | 
| Thoughtlace | U | Instant | Target spell or permanent becomes blue. (Mana symbols on that permanent remain unchanged.) | 
| Warden of the Woods | 4GG | Creature — Treefolk | Vigilance (Attacking doesn't cause this creature to tap.) Whenever Warden of the Woods becomes the target of a spell or ability an opponent controls, you may draw two cards. 5/7 | 
| Cowardice | 3UU | Enchantment | Whenever a creature becomes the target of a spell or ability, return that creature to its owner's hand. (It won't be affected by the spell or ability.) | 
| Shapers' Sanctuary | G | Enchantment | Whenever a creature you control becomes the target of a spell or ability an opponent controls, you may draw a card. | 
| Mirozel | 3U | Creature — Illusion | Flying When Mirozel becomes the target of a spell or ability, return Mirozel to its owner's hand. 2/3 | 
| Tethered Skirge | 2B | Creature — Phyrexian Imp | Flying Whenever Tethered Skirge becomes the target of a spell or ability, you lose 1 life. 2/2 | 
| Chaoslace | R | Instant | Target spell or permanent becomes red. (Its mana symbols remain unchanged.) |