Uber-Lucky!. The end-all be all switcheroo upset card that turns bad sitations on end and delivers unto you, salvation. This card is so good that a Taboo list appearance wouldn't surprise me in the slightest. For Silas Marsh i'dd take this even if it got the Key of Ys treatment.
First off, the requirement: Your total for a skill test must be 0!
This means that all of your skill value must be totally negated by a test, I.E, the effect is easier to trigger when your starting point is low, so that it might be negated by relatively mild negative tokens like a -2 or -3.
If you skill value is high, it becomes extremely unlikely for the requirement to trigger, attacking an enemy at +6 for example Yorick+Machete+Beat Cop, you'dd need a or somehow net -6 from the token draw, even on hard this is very unlikely! You'dd be much better served by a Lucky! that'd easily let you hit the required number (of probably 2-4) when your baseline is so high.
On the flip-side, if your starting point is +2 or +3, there are plenty of tokens in the average chaos bag that will totally negate that!
This leaves you two main uses for Eucatastrophe:
1) A tool to force success through tests which you have no business beating, for example attempting 4 tests with just 2, a common case for a variety of characters whose give them automatic success or +2, I.E, success!
2) A ward against worst-case scenarios, where an or special token might negate your skill value completely. There are, in fact, a few scenarios where the complete skill negation is slightly more common, Forgotten age for example has a few places where there might be 2+ net autofails when certain circumstances arise and most campaigns have crazy tokens in the final scenario.
The characters for whom Eucatastrophe is best for, are therefor:
- Dudes whose effects are desirable, for example Father Mateo (its blessed!), Silas Marsh, William Yorick (He can recurse Eucatastrophe itself!!!), Calvin Wright.
- Dudes who might find routine use via a low stat, This usually means sneaking through successes on investigation or evasion, note that there needs to be a bonus on the and your stat still must be reasonable so that you might be able to beat a difficulty 2-4 test, for example Rita Young investigating at a difficulty 2, 3 or 4 location.
- Dudes who have a tendency to be making high-stakes tests, generally in the current cardpool that means while shooting an Old Hunting Rifle, Ornate Bow or during Waylay or Backstab.
All of the above considered, a few characters rise up from the pile as obviously great characters for Eucatastrophe:
Silas Marsh whose is terrific, who needs clutch defense against treacheries and tends to be risking his life on major attacks with the biggest weapons the cardpool allows. Note that you can do the trick below with Drawing Thin if you add Resourceful to the combo.
William Yorick whose again is awesome and tends to be making important attacks. Also he can combine Drawing Thin and Eucatastrophe to be a funny kind of efficient at 1-4 difficulty investigating, especially late-campaign (Effectively autosucceeding on 1-2 difficulty investigation, at no net cost other then drawing the cards and playing Drawing Thin!).
Father Mateo, whose is literally a miracle and tends to be making lots of risky tests with Shrivelling and Rite of Seeking where a badly timed special token or can be lethal.
While Eucatastrophe is reasonable on the other characters who can take it, i feel that it's a lower priority, especially for Wendy Adams who has no appropriate stats to abuse and a +0 on her . Besides she excells at circumventing bad token draws to begin with!