Ongoing Spell • Cost: 0
Attach to a unit. That unit is a flagbearer.
Whenever an opponent plays a spell or ability that can ◎ a flagbearer, it must ◎ a flagbearer at least once.
Purple • Past Magic
You can attach this to an enemy unit. If you do, you still control Vortoss Emblem itself, so the time runes on it still count toward your Temporal Research. — Sirlin, 03/11/16