Thats a lot for a single mana worth of investment, and rather problematic when paired with cheap protection like Daze, Force of Negation, or even Spell Pierce
That's because after lots of science (aka deck-building sessions), the best players and deck builders have realized that the majority of cards in an aggro deck should be focused on one thing: killing the opponent quickly
Hangarback Walker - 5 So really only one archetype has much interesting in this card for the cube but it is one of the more powerful ones
Fortunately, thats not too hard through the use of tokens or mass reanimation spells like Ascend From Avernus, so you probably wont be paying 7 mana until Sepharas been removed 3 times and the commander tax forces you to
Finally, Sword of the Squeak
Language matters less than rarity and character when it comes to top-end cards