Artifacts, tokens, enchantments, and all sorts of counters.
Each color pairing will stick to these themes, but do that theme in a way that color would. BR artifacts will seek to sacrifice and recur, where UW artifacts will seek to gain counters and go wide.
Enchantments
Artifacts
Artifacts Beatdown
Artifacts Sacrifice
Sacrifice
counters
enchantments
Counters
Enchantments
Tokens
Sacrifice
Counters
Tokens
Enchantments
Enchanments
Sacrifice
Tokens
Artifacts
Energy
Sacrifice
Counters
Negative Counters
Tokens
Artifacts
Equipment
Enchantments
Tokens
Counters
Tokens
Energy
Enchantments