I love coming up with complex cards that are nonetheless within the realm of the possible for Incantus' engine. For example, I've got one card which is an equipment card with three abilities and no Equip keyword (one of the abilities attaches itself). Some of my favourite cards actually come from ideas other people gave me, in fact. Here's three cards (or rather the text thereof) the ideas for which were given to me by Incantus (for the first one) and Marek14 (for the other two):
Fencing Xenomorpher
3GU
Creature -
Shapeshifter1/3
As Fencing Xenomorpher comes into play, you may choose a creature in play. If you do, Fencing Xenomorpher comes into play as a copy of that creature and gains "Creatures come into play as a copy of this creature except for its name."
Yes, that
will turn every creature played into the same creature as long as any copies survive (since the copying ability will itself be copied).
Mirror Break
2UR
Sorcery
Put a token into play that's a copy of a creature of your choice target opponent controls. That player puts a token into play that's a copy of a creature of their choice you control.
I was especially proud of being able to code this one in Incantus.
Tax Collector
3WU
Creature - Human Advisor
0/2
At the beginning of your upkeep, if you control more permanents than each of your opponents, sacrifice Tax Collector.
At the beginning of each opponent's upkeep, that player chooses a permanent he or she controls. You gain control of that permanent.
I was afraid this one would be overpowered, but it actually worked out quite well in my test. The opponent just gave up cards like
Pacifism (which won't exactly change effects if their controller changes) until the Tax Collector self-destructed. So proper use of it is as much about timing as it is about having a deck made to take advantage of it (of course, being able to
Stifle the first trigger definitely improves it).