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Put Iris mark on the back of each permanent on the battlefield. You get an emblem with “Mana produced by lands with Iris marks on them can be spent only to cast spells or activate abilities of cards with Iris marks on them.”, “Creatures with Iris marks on them can be blocked only by creatures with counters on them and they can only block creatures with Iris marks on them.“, “Abilities and spells with Iris marks on them can target only permanents with Iris counters on them.“, “If a player would be dealt damage by a source with Iris mark on it, that player sacrifices a permanent with Iris mark instead.” and “Planeswalkers and battles with Iris marks on them can be attacked by creatures with Iris counters on them instead”