Twinflame is an interesting card to say the very least. At 1R, it allows you to make a temporary hasty clone of a creature you control. This can honestly be quite a powerful effect – copying something like Blightsteel Colossus or Wurmcoil Engine can be terrifying, especially with haste at only 1R. The only real downside to this card is that it is only at sorcery speed, so you can’t make instant speed clones for blocking.
Now, the interesting part about this card is the Strive cost, which allows you to play an additional 2R per additional target you want to copy. Essentially, if you have the mana for it, you can clone your entire board and swing with twice as much power as you had before. At the moment, the card is selling for around a dollar, so it may be a good time to get these now. It isn’t as broken as Splinter Twin, of course, but it is still a fairly impressive card. This also means that Battlefield Thaumaturge makes these clones cost even less.
As a Commander player, I really like this card. When I’m playing a deck like Sedris, the Traitor King, being able to copy my entire unearthed board isn’t too difficult and changes the game entirely, making it much easier to swing out and kill another player with creatures like Wurmcoil Engine, Inferno Titan, Grave Titan, etc.