At the beginning of your upkeep,
surveilTo “surveil N” means to look at the top N cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.
If an effect allows you to look at additional cards while you surveil, those cards are included among the cards you may put into your graveyard and on top of your library in any order.
If a player is instructed to surveil 0, no surveil event occurs. Abilities that trigger whenever a player surveils won’t trigger.
An ability that triggers whenever a player surveils triggers after the process described in rule 701.25a is complete, even if some or all of those actions were impossible. (CR 701.25) 1.
To solve — There are fifteen or more cards in your graveyard. (If unsolved, solve at the beginning of your end step.)
SolvedSolved is a keyword ability found on Case cards. See rule 719, “Case Cards.” “Solved” is followed by ability text. Together, they represent a static ability, a triggered ability, or an activated ability.
For a static ability, “Solved — [Ability text]” means “As long as this Case is solved, [ability text].”
For a triggered ability, “Solved — [Ability text]” means “[Ability text]. This ability triggers only if this Case is solved.”
For an activated ability, “Solved — [Ability text]” means “[Ability text]. Activate only if this Case is solved.” (CR 702.169) — Whenever you
castTo cast a spell is to take it from the zone it’s in (usually the hand), put it on the stack, and pay its costs, so that it will eventually resolve and have its effect. A player may cast a spell if they have priority. See rule 601, “Casting Spells.”
To cast a card is to cast it as a spell. (CR 701.5) a nonlegendary creature spell, copy that spell. (The copy becomes a token.)