If this card somehow enters the battlefield with its back face up, it didn't transform, so you won't choose an opponent
Like, if something was an awesome idea, we did it. He pointed to having a card that showed off 15 different versions of the character Cid, or having just one pair of cards with the Meld mechanic because it mechanically and emotionally fit the characters on those cards as examples
So even if damage is doubled, the Trample math happens before that
Tataru Taru is a reasonable mana generator in mono-white which is still the color that struggles the most with getting those more explosive turns where mana can be leveraged for big plays
Target Mirabel and your other good on-play ability characters
Youll have access to every piece you need, fast mana, card advantage, and powerful interaction, at a reasonable cost