Hopefully you have a means to draw cards by turn 3 or 4
Some cards and strategies, especially those featured in sets like Tarkir: Dragonstorm and Aetherdrift, are designed to excel in multiplayer environments
With two cards acting as complete blowouts with Grief, its important to understand that getting stranded with one or two of those effects for a turn or two is fine because they allow for some huge turns that will leave the opponent scratching their head
When that spell or ability resolves, Abrupt Decay won't be countered, but any additional effects of the countering spell or ability will still happen
A combo can be any set of cards which effectively ends the game in your favor, be that a prison like Teferi + Knowledge Pool, infinite damage/mill, or even a very fast combat clock like Skithiryx, the Blight Dragon + Lightning Greaves
The Blightbeetles are an obvious nod to Mono-Green Devotion and Hardened Scales, which, based on the mad search for Vivien, Arkbow Rangers that played out on Twitter leading up to the event, I expected would be quite popular