The triggered ability looks at whether you've gained life in the turn, even if Witch of the Moors wasn't on the battlefield when you gained life
Turn three cast Kodamas Reach: Turn four we cast Heartbeat of Spring and use the extra mana it generates to active Krosan Verge: On Turn Five we cast Turnabout floating **WWUURRBBGG and cast Tiamat searching for Morophon, Miirym, Terror of the Peaks, Niv-Mizzet Reborn, and Scion of the Ur-Dragon and cast them in that order
As such, it might behoove you to refer to DailyMTGs breakdown of those for more information
GW Auras This is based around building a single powerful threat and trying to protect it - that way it can deal one or two big attacks to win the game
or declaring cards "counterfeit" at your events simply because they are misprinted, miscut, or "weird looking," is not the way to do it