what cards are in mtg arena Magic The Gathering: Arena · Time Spiral Timeshifted

It grows bigger with each spell you cast, pings every opponent, and then turns into a colossal amount of mana ready to cast yet more spells

That is by design

Ambitious Dragonborn Ancient Bronze Dragon Avenging Hunter Bloomvine Regent Broodcaller Scourge Canopy Dragon Canopy Gargantuan Destructor Dragon Disruptive Stormbrood Draconic Muralists Dread Linnorm Earthquake Dragon Emerald Dragon Foe-Razer Regent Green Dragon Herdchaser Dragon Jugan, the Rising Star Kura, the Boundless Sky Lurking Green Dragon Old Gnawbone Pet Avengers Remnant of the Rising Star Sagu Wildling Scaled Nurturer Silvanus's Invoker Skanos Dragonheart Wandering Troubadour

You generally cant use proxies in most tournament settings for obvious reasons, but they are a very celebrated option in casual formats like Commander

Although the group of Lost Boys on the shore is even more minuscule, their energy is clearly captured through movement