Maickrox, Assassin Lord

Deathtouch, Reach, Haste, Landwalk (Swamp)
When Maickrox, Assassin Lord enters the batlefield, destroy {x} creatures and surveil {x} where {x} is the number of
extra mana spent to cast Maickrox, Assassin Lord.
If you placed a Dimir Guildgate this turn,
Maickrox, Assassin Lord gets +2/+2
until the end of the turn.
I am the last thing you will ever see
-Maickrox, Assassin Lord