This lets Anikthea draw two cards when it comes into play, provided it has an enchantment to put into play, and draw an additional card each time it attacks
Sure, you would probably pick Dig over Treasure Cruise when you know you are in control but you are still happy to run either, sometimes both
Blink something like Triskelion that has used its counters
It does not specify that the damage need be the reason that the damaged creature goes to the yard
Many Delta cards look almost identical to their Gamma versions, just with tiny tweaks to rules text or mana costs, though some brand-new cards appeared here, too
On the other hand, we expect they will spice up a wide variety of non-tournament games (as long as everyone's on the same page about using them!)