
ToxicToxicPlayers dealt combat damage by this creature also get a poison counter. 2
: Each other creature you control with toxictoxicPlayers dealt combat damage by this creature also get a poison counter. gains toxictoxicA player dealt combat damage by a creature with toxic also gets poison counters equal to that creature's total toxic value. 1 until end of turn. Activate only once each turn. (A player dealt combat damage by a creature with toxic also gets poison counters equal to that creature's total toxic value.)
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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.