Can you respond to the choice of what to copy with Phantasmal Image? It depends!

This is a very common question with any kind of copy creature. The most important thing to note is that the static ability that lets you choose to copy something is NOT a triggered ability (if it was, pretty much every Clone-type creature would die for being 0/0 before you could choose to copy something!). It's a replacement effect that modifies how it enters the battlefield. So what does that mean for you? If you let a resolve, the choice to copy something is made immediately as it resolves

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Sun Titan can get auras onto your opponent’s hexproof creatures.

I know this blog mostly covers Standard and Limited, but I personally play a whole lot of Commander. One tricky thing that comes up there a lot is how you can slap Auras onto dudes with Hexproof or Shroud. The trick to it is that Auras only target when you cast them as spells. If you get an Aura onto the field, and bypass the stack, then all you need is something it can legally be attached to. No targeting required. Because of that, you can, say, cast and bring back your from the graveyard

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