usually Wizards of the Coast releases preview cards over the course of two weeks, but for this set they've chosen to use an accelerated schedule that puts information on all of the cards into the hands of players by January 06, 2017
+1/+1 counters synergy : 21 cards Benthic Biomancer, Deeproot Elite, Forerunner of the Heralds, Herald of Secret Streams, Tributary Instructor, Zegana, Utopian Speaker, Prime Speaker Zegana, Ripples of Potential, Inspiring Call, Quandrix Command, Fuel for the Cause, Wave Goodbye, Hardened Scales, Simic Ascendancy, Bred for the Hunt, Forge of Heroes, Littjara Mirrorlake, Llanowar Reborn, Novijen, Heart of Progress, Oran-Rief, the Vastwood, Nicanzil, Current Conductor As we can see we have a strong presence of +1/+1 counters strategy cards
however, this generally applies only to certain Trainer cards: 065/064 Exeggcute 066/064 Shiinotic 067/064 Castform (Sunny Form) 068/064 Bruxish 069/064 Cetitan 070/064 Latios 071/064 Vibrava 072/064 Clobbopus 073/064 Skarmory 074/064 Flapple 075/064 Appletun 076/064 Braviary 077/064 Black Kyurem ex 078/064 Latias ex 079/064 Tera Flygon ex 080/064 Archaludon ex 081/064 Tera Alolan Exeggutor ex 082/064 Tera Cyclizar ex 083/064 Drayton 084/064 Surfer 085/064 Drasna 086/064 Lisia 087/064 Latias ex 088/064 Archaludon ex 089/064 Tera Alolan Exeggutor ex 090/064 Drayton 091/064 Lisias Appeal 092/064 Tera Alolan Exeggutor ex 093/064 Counter Gain 094/064 Jet Energy Whats New In Paradise Dragona
(2021-07-23) If an effect begins to apply to the first target permanent before it becomes a copy of another permanent, that effect will continue to apply
