If you have more land than your opponent, or if your spells are cheaper than their counterspells, or if (as above) you have instants to lead with during their end step, it can pay to save threats in hand until they exceed the number of solutions your opponent can pay for, regardless of if they have them
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A well-tuned Gyruda deck can potentially ride their first chain of triggers all the way to a win
When facing Ugin it can be very hard to play around it too and you just have to hope they don't see him, or of course that you beat them before they get to eight mana
Using Delve to cast one mana card draw, disruption, and removal is a great use of the card, and probably more viable than the cheating out big things approach honestly
[c]City of Brass[/c], [c]Mana Confluence[/c], [c]Exotic Orchard[/c], [c]Forbidden Orchard[/c], and [c]Gemstone Caverns[/c]: are all functionally similar to [c]Command Tower[/c], only they come with slight downsides and restrictions