Not a review but to clarify rules on this tricky card: when you return the token, its effets are not canceled, but its modifier is. So you apply the modifier of the second token, but the effects of both.
Revelation - Put Rex's Curse into play in your threat area.
Forced - When you would succeed at a skill test: Return the revealed chaos token to the bag and reveal a new chaos token. If this effect causes you to fail the test, shuffle Rex's Curse into your deck. (Limit once per test.)