The big line is: All creatures have haste. The moment anything enters, it can attack, whether its yours or your opponents
M21 has been more generous still, reprinting several awesome tools which will have both immediate and long-term implications
And really, what could sum up the theme of Duskmourn better than that last statement
(Choose any number of permanents and/or players, then give each another counter of each kind already there.) Whenever a player casts their second spell each turn, proliferate
6 A "Lifetime" Pass Holder Never Stays Dead For Long A 2/1 for one mana is already decent, even if it's less impressive in Commander , but the ability of a "Lifetime" Pass Holder to recur themselves from the graveyard for free has a lot of uses, especially given the various ways to tinker with rolls to improve the odds of a six
It usually costs 8 mana to cast and allows you to draw 3 cards