AI DraftFeb 26, 2026
Displacer Kitten + Mox Opal + Teferi, Time Raveler
Overview
Teferi, Time Raveler’s static restriction prevents opponents from casting spells except any time they could cast a sorcery (main phase, with priority, empty stack) . That restriction controls when you may cast the noncreature spell that triggers Displacer Kitten’s triggered ability; Teferi’s restriction isn’t overridden by permissions that would let you cast spells at instant timing (see Ruling [2024-01-12]). Displacer Kitten’s triggered ability triggers when you cast a noncreature spell and, when it resolves, exiles then returns the chosen permanent as a new object (so a returned Mox Opal is a new object with no prior state) and (Ruling [2022-06-10]). Mox Opal’s 
: Add one mana of any color is a mana ability that can be activated when you control three or more artifacts (Metalcraft); Teferi does not stop activating Mox Opal, but Teferi can stop you from casting the spell that would cause Displacer to trigger if you are an opponent .
: Add one mana of any color is a mana ability that can be activated when you control three or more artifacts (Metalcraft); Teferi does not stop activating Mox Opal, but Teferi can stop you from casting the spell that would cause Displacer to trigger if you are an opponent .Step 1
You (the opponent of Teferi’s controller) may only cast spells at times you could cast a sorcery (main phase, with priority, empty stack) because Teferi’s static ability restricts your casting times .
Step 2
When you cast a noncreature spell (for example, an artifact spell or an instant cast during an allowed time), that casting is performed following the steps in ; after the spell is cast but before it resolves, Displacer Kitten’s triggered ability ("Whenever you cast a noncreature spell …") triggers and is put on the stack .
Step 3
When choosing targets for Displacer Kitten’s triggered ability, you must pick a legal target that is a nonland permanent you control. You cannot target a spell on the stack (a spell on the stack is not a permanent), so you cannot target the noncreature spell you just cast if it’s still on the stack .
Step 4
When Displacer Kitten’s triggered ability resolves it exiles the chosen permanent and then returns that card to the battlefield under its owner’s control as part of the same resolving ability; the returned permanent is a new object with no memory of its previous existence (Ruling [2022-06-10] and ).
Step 5
If the exiled/returned permanent was Mox Opal, the Mox that re-enters is a new object. Any counters, equipment attachments, or auras that were on the original Mox Opal are not carried over; equipment becomes unattached and Auras go to graveyard if they were attached to the exiled object (Ruling [2022-06-10]).
Step 6
Mox Opal’s : Add one mana of any color is a mana ability you may activate when you have priority and Metalcraft (three or more artifacts) is satisfied at activation time. Teferi’s static ability does not stop you from activating mana abilities; it only restricts when you may cast spells .
: Add one mana of any color is a mana ability you may activate when you have priority and Metalcraft (three or more artifacts) is satisfied at activation time. Teferi’s static ability does not stop you from activating mana abilities; it only restricts when you may cast spells .Step 7
If you hope to use Mox Opal to pay for a noncreature spell that will trigger Displacer Kitten, you must be allowed to cast that spell under Teferi’s restriction (see first step).
Resolution
If you (an opponent of Teferi’s controller) control Displacer Kitten and Mox Opal, Teferi’s static ability restricts when you may cast the noncreature spell that will trigger Displacer Kitten to exile/return a permanent: only any time you could cast a sorcery (main phase, priority, empty stack) ; a permission to cast with flash does not override that restriction (Ruling [2024-01-12]). Displacer Kitten’s trigger can exile and return Mox Opal; when Mox Opal returns it is a new object with no memory of what it was before (Ruling [2022-06-10]). Mox Opal’s mana ability may be activated whenever you have priority and Metalcraft is satisfied; Teferi’s presence does not stop activating mana abilities .
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