In the late game, if you dont need a random mana rock anymore, cash it in for a Golem of variable size
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His dark mark was the Giant
Stop trashing when you would trash a level 3 card or the Digimon's last card.) Card Text 2 [Inherited Effect] [When Attacking][Once Per Turn] Reveal the top 3 cards of your deck
I find that formalizing things and putting numbers to them, even if they are estimates and hard to measure, very helpful in doing this
Mutating a creature onto Ivy turns it into a token copy, giving you all sorts of potential for shenanigans, especially if you play a few copy spells and choose to make Ivy nonlengendary by placing the mutate creature on top of Ivy