Encore allows you to exile this card from your graveyard to create a copy of it for each opponent you control
Along the same lines, Modern Horizons 3s forgotten mythic Ashling, Flame Dancer jumped over 200% to more than $20 thanks to its synergy with firebending, where it allows you to turn all of your temporary for combat only mana into real mana you can use whenever you want
Absolutely he will be Skullclamp'd over and over to draw 2 cards for 4 mana
The +1/+1 counter is doing a lot of work here to help amp up the pressure
I probably dont need to explain why discarding cards to draw cards is the best way to take advantage of whenever you discard triggers, but Id argue its so good and central to the plan that you should basically consider whenever you draw effects to belong in the discard archetype as well
The attrition approach also allows you to keep mana up more easily for interaction, should the need arise, allowing you to protect your cards, destroy others, or simply buy time to assemble and cast a winning combination of cards