Whenever Clement or another creature you control enters, return up to one target creature you control with lesser mana value to its owner's hand.
Frogs you control have ": Add or . Spend this mana only to cast a creature spell."
Flood the board with creatures that have powerful enter-the-battlefield triggers, then use Clement to bounce a cheaper creature back to hand every time something enters so you can replay it and re-fire those triggers. You generate enormous value loops with ETB creatures and ramp into bigger threats while building a wide board and mana-producing Frogs.
Repeatable ETB value engine that snowballs harder than most blink decks since it triggers off every creature you play
Built-in ramp and card advantage through bounce-and-replay loops of value creatures
Frog tribal mana production accelerates creature spells aggressively
Flexible bounce can save creatures from removal, untap targets, or reset auras/counters
Relies on the commander sticking around; without Clement the engine collapses
Bounce is mandatory-ish and only hits lesser mana value, so it can awkwardly return your own pieces
Vulnerable to board wipes that erase your creature investment
Can be slow to actually close games without a dedicated payoff or combo finish
Heavy creature reliance makes graveyard hate and stax punishing
Legendary Creature — Frog Druid
: Add