mtg cards with changeling Mothdust [Modern Masters] sacrifice it unless you exile another creature you control MtG Lorwyn Eclipsed Uncommon Omni-Changeling

One of the things I like to do when tweaking a returning mechanic is to find some variable we haven't messed with yet

If you are able to attack a battle (with Sieges, every player who is not the protector can do so, though this may differ with other battle subtypes), you can attack with your creatures , or use direct-damage spells that allow you to either target a battle specifically, or merely say any target

For example, if you have 3 life and an effect says that your life total "becomes 10," you would gain 7 life which Phial doubles to 14, so your life total will actually become 17

Importantly, because you cast that spell, youre even going to get cast triggers out of your Eldrazi