If you attack with multiple creatures equipped with Hexplate Wallbreakers in one combat phase (or one creature equipped with multiple Hexplate Wallbreakers), you'll have that many additional combat phases, but your attacking creatures are untapped only during the current combat phase
Having a stage one basic that can hit for 300 damage and even survive a one-hit KO with 10 HP is incredibly strong
Incapsula incident ID: 567000120634675916-508823083377165103
Liliana of the Veil (Sacrifice Black Planeswalker) One of the best planeswalkers ever printed, [c]Liliana of the Veil[/c] is a fantastic answer to nearly anything
To be fair, thats not the strongest attack right now in the game
Many of these pieces were made available as merchandise in the museums gift shop, including Pikachu With Grey Felt Hat, which is inspired by Self-Portrait with Grey Felt Hat