Chrono Filter provides you with one blue and one red only once every two turns due to its 2Exhaust. Only one Chrono Filter can be built. It is especially useful in Random sets with units that need both blue and red to build (for example, Hellhound) and for units where you need one additional blue or red, but do not want to purchase an additional Blastforge or Animus (for example, Amporilla off a single Animus).
Chrono Filter has the same gold-to-tech ratio than Blastforge and Animus: 1 blue every 2 turns is worth 2.5gold, plus 1 red every 2 turns is worth 1.5gold for a total of 4gold on average. Therefore it is perfectly fine to build if you can utilize it wisely.
A strategy is to build Chrono Filter early (going second on turn 2 for example, instead of an early Conduit) and then build aggressive units very early.
Additionally, Chrono Filter is very strong in sets with units that have a high tech-to-gold cost ratio (such as Pixie or Shadowfang) as it allows you not to waste left over tech. For example, if you have 14 Drones, an Animus, a Blastforge, and a Chrono Filter, you can buy two Tarsiers and a Wall in each turn where Chrono Filter doesn't activate, and buy a Shadowfang, a Pixie, and a Wall in each turn it does, thereby not allowing any tech to go to waste.
For example, in a random set with:
If you have:
- 14 Drones
- an Animus
- a Blastforge
- a Chrono Filter
Your Resources will be as follow:
As a result, you can buy:
- On Chrono Filter's turn, a Shadowfang, a Pixie, and a Wall.
- On Chrono Filter's off turn, two Tarsiers and a Wall.
Thereby your tech is used to its fullest extent.
- October 23rd, 2014
- Prismata’s Tech Trees: The stories behind Prismata’s craziest units, a blog post by Will Ma. (October 24th, 2014)