Yesterday's Golgort

Yesterday's Golgort
UnitBeastCost: 3ATK: 6 HP: 4
Fading 2 (Arrives with two time runes. Remove one each upkeep. When you remove the last, sacrifice this.)
Whenever you deal combat damage to a building, put a time rune on this.
PurplePast Tech II

Card-Specific Rulings
The Golgort's ability to gain a time rune triggers even if "you" deal combat damage to a building with another unit, or with a hero. It doesn't have to be with the Golgort itself. — Sirlin
Fading X Rulings
If you remove the last time rune for some other reason than the fading ability, such as from Time Spiral, Seer, or Tinkerer, you still must sacrifice the fading thing. — Sirlin
If you somehow have something with fading in play with 0 time runes (probably because you made a copy of something if fading), it won't die from fading anymore. — sharpo
X is not a limit to the number of time runes you can have on that card. For example, you can play Shimmer Ray and discard 4 cards so that it has 6 time runes; you're not limited to 2 total. — Sirlin