"Dash [cost]" means "You may cast this card by paying [cost] rather than its mana cost," "If this spell's dash cost was paid, return the permanent this spell becomes to its owner's hand at the beginning of the next end step," and "As long as this permanent's dash cost was paid, it has haste." If you choose to pay the dash cost rather than the mana cost, you're still casting the spell
The engine is far too slow for Modern, and Im not sure what the payoff is if youre building a brand-new Standard deck around Kykar
Reconnaissance Mission is an enchantment that greatly help us with card draw since we can expect to attack with many creatures and deal many times damage to a player and thus draw many cards from it
The cases were a neat new card idea - they tended to be hit mor miss, but at least they opened the door for possible build arounds
Sire of Stagnation This mythic Eldrazi was probably meant to be played with Ulamog's Reclaimer, Oracle of Dust, and the ingest creatures, but Dimir is a good color pairing to be in if youre exiling cards from the top of your opponents libraries