For the Unknown Event cards, your best bet is probably to proxy any that have previously existed, though you might occasionally find a few on the secondary market
Hushwing Gryff prevents creatures from triggering their abilities when they enter the battlefield, so you wont have to skip a turn when Wormfang Manta comes into play
Aggressive Mechanics The most obvious reason that Amonkhet block is aggressive is Exert
For , we get a graveyard seal effectgraveyard seal effect on a 3/4 lifelinking body, with the ability to make tons of 2/2 tokens over the course of a long game
That card is $5 right now, and I expect itll get close to $10 by early January simply due to people buying into the possibility of an unban
The best part about Eladamri's Call is that it is at instant speed, so you can wait until your opponent's end step and cast this before your turn, potentially helping you get out of a sticky situation