Modern, "fateful hour" (8)
Creatures you control get +1/+1 until end of turn.
Fateful hour — If you have 5 or less life, those creatures gain indestructible until end of turn. (Damage and effects that say "destroy" don't destroy them.)
Prevent all combat damage that would be dealt this turn.
Fateful hour — If you have 5 or less life, tap all attacking creatures. Those creatures don't untap during their controller's next untap step.
Target permanent you control gains protection from the color of your choice until end of turn.
Fateful hour — If you have 5 or less life, instead you and each permanent you control gain protection from the color of your choice until end of turn.
Create two 1/1 white Human creature tokens.
Fateful hour — If you have 5 or less life, create five of those tokens instead.
Fateful hour — As long as you have 5 or less life, other creatures you control get +1/+4.
Counter target spell.
Fateful hour — If you have 5 or less life, draw a card.
: Create a 1/1 white Human creature token.
Fateful hour — As long as you have 5 or less life, other creatures you control get +2/+2.
Vigilance
Fateful hour — As long as you have 5 or less life, other creatures you control have vigilance.
Gatherer works better in the Companion app!