mtg fury card Mark of [Urza's Destiny] – The Nerdporium Khorvaths Fury deals damage to each foe equal to the number of cards in their hand. Fury · Modern Horizons 2

It is not possible to end the Attack Phase if even one of the opponents Forward cards is still able to Attack

Perhaps the craziest thing about that statement is that Tiamat is not unanimously the best Dragon Commander since the archetype also has access to cards like The Ur-Dragon

It both enhances mono-color decks, which are able to play these colorless lands in greater numbers, and gives decks without easy access to card draw the ability to use mana productively every turn

Add just one other card that ensures creatures enter the battlefield with a +1/+1 counterwhether that be from Master Biomancer, Cathars Crusade, Juniper Order Ranger, Good Fortune Unicorn, or Path of Discoveryplus a sacrifice outlet, you can go infinite pretty easily