Treasure is another category that technically counts as ramp, but won't be included here
Set Number 38 Language Franais Legal Formats Commander, Legacy, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Modern, Pauper, Pioneer, Standard, Timeless Rulings (6/6/2025) Lulu's first ability only cares about creatures attacking you, not planeswalkers you control or battles you protect
The checklist card has a regular Magic back, and it looks like this: To use the checklist card, you must have the actual double-faced card
While it's in play, if a Creature you control with power one or less dies, you may return it to the battlefield at the beginning of the next end step if Shirei is still on the battlefield
Convoke (and other tap an untapped creature you control costs) are most common, but some decks can also harness affinity, improvise, sacrifice costs, conspire, and other creature-dependent discounts
If your creature then dies, this makes no difference