Time: Mechanics

Vanishing: This permanent comes into play with PARAM1 time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it. Used on 19 cards: Cloud Current, Secondscrounger, Flickerwatch, Timestream Overseer, Temporal Teapot, Gift of Farsight, Reset, Time Thief, Rift, In Between, Rift Leech, Ghostly Sparks, Keeper of Whispers, Protection from Reality, Firelight Militant, Impatient Lackey, Frosted Walker, Rift Warden, Farsight Sparrow, Appease the End, Torpor Snail

Returning mechanic. Never explored a whole lot but could have some complex and interesting design space.

In card text or details pages, write the mechanic's code name (playtest name) between square brackets, like "[Crittercast]", "[Bushido 1]" or "[Delay 4 {2}{R}{R}]". It will be expanded to the mechanic's name plus reminder text, such as "Suspend 4 – {2} {r} {r} . (Rather than cast this spell from your hand,...)"
To expand a mechanic's name but not its reminder text, include parentheses at the end of the square brackets: "[Crittercast()]", "[Delay 9 {R}()]".