Both haste and flash traditionally only mattered the turn the creature entered, but Sonic can buff them up with a +1/+1 counter each time he attacks, and then makes tapped Treasures whenever he or any other creature with flash or haste takes damage
Credit: Wizards of the Coast Calamity, Galloping Inferno Marcy: A six mana body in red is just such a big ask
Creature - Elf Detective Color tag templates(None) Blossoming Tortoise Whenever this creature enters or attacks, mill three cards, then return a land card from your graveyard to the battlefield tapped
Pendelhaven Another low opportunity cost pump land, Pendelhaven has some real pedigree in non-EDH formats, particularly in old Modern Infect builds
Its a conditional Swords to Plowshares, yes, but that exile clause is seriously important