Or sacrifice it to Attrition and then bring it back
For example, Bedlam Reveler will cost RR to cast if you have seven instant and sorcery cards in your graveyard while you control Geist-Fueled Scarecrow
The Fire Crystal makes your red spells cheaper, which helps you to double-spell and keep turns explosive, and it also lets your creatures attack the moment they hit the board, so you stay on the front foot
Not legal in sanctioned tournament play
Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.) When RMS Titanic deals combat damage to a player, sacrifice it and create that many Treasure tokens
Slither Blade Its little and low impact, yes, but Slither Blade is also unblockable and its a rogue