Mark of Fury

The bounce clause is the entire pitch. Most haste-granting auras are a one-time investment that overcommits to a single creature: lose the body, lose the enchantment, and you have spent two cards to attack a turn early. Here the return-to-hand trigger reframes the spell as reusable haste-on-demand, a single red mana you re-buy each turn the moment a fresh threat needs to attack the same turn it arrives. That converts it from a permanent into a recurring tempo tool: cast a creature, suit it up immediately, then collect the Aura at end step to do it again on whatever drops next. The price of that reusability is the same trigger that grants it; the haste evaporates when the Aura leaves, so it never builds a board the way a sticky pump aura does. It is pure timing manipulation, turning the summoning-sickness rule into a per-turn toll you can pay repeatedly rather than a wall you climb once. The conditional part is the survival requirement: the Aura only returns if the enchanted creature lives to the end step. Kill that creature with a removal spell or a chump block before the trigger resolves and the Aura falls off and dies alongside it, no return. So it wants to be cast on whatever just hit the battlefield to attack right now, not on the one creature you have decided to protect.