That is super late game for any kind of deck let alone an aggressive deck
This is where TCGplayer can help out
Become a Valvagoth, a Tidespout Tyrant, etc, with the potential to flicker for the occasional bit of gravehate
Bronzehide Lion has a solid body and a good ability in a deck that relies on keeping a creature on the battlefield to be able to enchant
Then, he can use his ability Cheer, which allows you to draw and card and add a counter to another creature when a creature with a counter attacks
To support it without relying on it, I prioritized artifact mana acceleration like Thran Dynamo, Basalt Monolith, and all the artifact creatures I could get