Tabetha, Who Meets Many

Creature spells you cast have convoke. (Your creatures can help cast those spells. Each creature you
tap while casting a creature spell pays for {1} or one
mana of that creature's color.)
Defiance -- Whenever Tabetha, Who Meets Many attacks the player who controls more creatures
than each other player, create two 2/2 green Elk creature tokens that are tapped and attacking.
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"All will fight to the end."