If a Trigger or Trigger-like Effect meets its activation timing during the activation or resolution of a Chain, its effect cannot be activated until that Chain has fully resolved
item lock on a Stage 1, and it was very, very strong
Maybe you consistently churn out a ton of mana to spend on huge spells as games run long into the night, but youd rather it be a little more guaranteed than it is when it comes to Magisters effect
In the main series Pokmon games, shiny Pokmon, including Magikarp, have a very low chance of appearing in the wild, in raids, or from hatching eggs
For Mirror Box, that rule is the legendary rule that says you're only allowed one copy of a legendary creature card on your battlefield at the same time