
Eminence — At the beginning of your upkeep, Sahir deals 1 damage to you. This ability triggers only if Sahir is in the command zonecommand zoneThe area where your commander waits before you cast it, and where it may return instead of going to the graveyard, exile, your hand or library. or on the battlefield.
Whenever a source you control deals exactly 1 damage to you and whenever a spell or ability you control causes you to lose exactly 1 life, put a +1/+1 counter on Sahir. If this is the second time this ability has resolved this turn, draw a card.
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Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.