502.4.a. The current turn player, phase, step, state of the turn, and who has priority and focus.
502.4.b. Rune Pools and the number and quantity of resources in them.
502.4.c. All players’ current scores.
502.4.d. A permanent’s current state, as distinct from its printed ones.
502.4.e. Spells and abilities on the Chain, their order, and play choices made for them.
502.4.f. Spells and abilities that resolved previously in the turn, and the sources of them are themselves public.