If you play Fangs for the Overload cost, it applies the doubling effect to all of your creatures
Hammer is a really simple card
Aegar, the Freezing Flame Every time your burn spells or giant friends deal more damage than needed to finish a creature or planeswalker, Aegar, the Freezing Flame rewards you with fresh cards
With all sorts of wild ways to make Goblin creature tokens, you can reliably deal damage to your opponents every turn
Being at six mana, youre really not saving much mana on a lot of creatures, making it feel a bit counterintuitive to play since you might as well just hard-cast whatever creature youre trying to bring back
Also note that it taps, so it's just one use per turn