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I find the most consistent decks are ones that are aiming to get to the six to eight region on turns four or five
It's great if you have someone in your play group who likes playing mana-dork decks with things like Birds of Paradise and Llanowar Elves
The latter one was just printed and then you can tap it with five mana to sacrifice to get a free discover 4, which is card value since you can draw it if it's not feasible unlike cascade 4, and then you can trigger your leader
Cast, copy, draw, and fly over your foes to secure victory in style
An obvious example is Polukranos, World Eater, which offers a substantial board presence early as a 5/5 for four but also threatens to destroy your opponents entire team and become absolutely enormous given sufficient mana to go monstrous