If we have Entity Tracker in play, we can draw our entire deck, letting us find Balemurk Leech,Grim Guardian, or Scrabbling Skullcrab to close out the game
Once that ink is exerted, it cant be used again
It is just the reliability you desire
First of all, excluding a staple of the format like SkullclampSkullclamp, none of these cards really result appealing for Marneus CalgarMarneus Calgar players
Mark Rosewater has an indepth article on the mothership explaining the reasons behind the changes, but the summary is: The Fall, Winter, and Spring Sets will all be large sets that are drafted alone (no more "blocks" or "small sets") The Summer Set will be a revamped Core Set (roughly half reprints, half new cards) A different approach to the Gatewatch (pulling back on apperances as planeswalker cards) The Masterpieces Series will revert to being in fewer sets (none in Ixalan) We're changing things behind the scenes (new R&D group "Play Design")
Go-Shintai of Life's Origin and Hei Bai, Forest Guardian both cost 4 mana, and they both have WUBRG activated abilities