Faith's Fetters and
Arrest are different.
Gideon Jura is not really the same as
Alluring Siren.
Crystal Shard - "Unless$ 1" only works for soft counters as far as I know and not for abilities in general.
The problem with
Wild Dogs is that the player with the highest life total might change between the triggering and the resolving of the trigger, I think.
Impulse -like cards with "look at/reveal the top
X cards" have to be hardcoded so far.
There is no "sacrifice me unless you do something"-mechanic implemented yet, which is why cards like
Gilded Drake and
Glint Hawk aren't scripted so far.
Myr Battlesphere is not doable with triggers (at least for me). I tried to script it in quite a few ways, but none worked.
Rebound is pretty hard to implement, like "copy a spell" effect in general.
Banefire is probably doable, although as sort of a workaround. I'll try it.
Chain Lightning needs a way of making choices when the spell resolves, and it copies spells.
Flip cards and split cards won't be implemented during the near future I guess.
Profane Command -
X-spells with the
X influencing what can be targeted are pretty tough. "up to
X" is even tougher, and a card with two of those and two other abilities that use the same
X is probably impossible at the moment.
Hero of Bladehold is implemented.
Hero of Oxid Ridge isn't, because the can't-block-effect has to be independent of its source and the creatures it affects, which isn't possible so far (with some exceptions like simple fog effects).
Unrealistic is unrealistic.
Sundering Titan makes you choose more than one card and then destroy all of them. You have to able to choose the same land twice or more, and that makes most easy ways of scripting the Titan incorrect.
Terastodon can destroy up to three noncreatures, that works. But checking whether or not those are put into a graveyard as a result is not possible.