Is Azuki’s Sealed IKZ like lands that don’t untap during your next untap step in Magic?
MostlyMostly. Both keep spent resources tapped past your next untap phase as a drawback for an above-curve effect, except Sealed also blocks manual untap effects until after that Reset phase.
Sealed in the Azuki TCG
A Sealed IKZ is a tapped IKZ resource that cannot be untapped until after your next Reset phase (your start-of-turn untap). Mirrored Reflection plays a Water entity costing up to 5 for 3 IKZ now (while letting your opponent play an entity costing 5 or less into their Alley), then Seals 2 of your tapped IKZ so they skip your next Reset phase.
The same
- Spent resources skip their next automatic untap, then untap normally on the turn after.
Different
- In Magic, an untap effect like Twiddle or Seedborn Muse’s ability can immediately untap an exerted land or a land that “doesn’t untap during your next untap step” (whereas a stun counter replaces any untap by removing the counter instead). Sealed blocks untapping from any source until after your next Reset phase, then clears while leaving the IKZ tapped.
Magic: The Gathering: checked against the Magic Comprehensive Rules. Azuki TCG: printed card text and the rules.

