Martyr's Soul

Jun 14, 2019 · If you control any tapped lands as Martyr's Soul enters the battlefield, its last ability doesn't trigger at all. If you control any tapped lands as the ability resolves, you won't put two +1/+1 counters on Martyr's Soul.

Jan 12, 2024 · Because convoke isn't an alternative cost, it can be used in conjunction with alternative costs.

Jan 12, 2024 · If a creature you control has a mana ability with {T} in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell's costs. You won't be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke.

Jan 12, 2024 · Tapping a multicolored creature using convoke will pay for {1} or one mana of your choice of any of that creature's colors.

Jan 12, 2024 · You can tap any untapped creature you control to convoke a spell, even one you haven't controlled continuously since the beginning of your most recent turn.

Jan 12, 2024 · When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn't change a spell's mana cost or mana value.

Jan 12, 2024 · Tapping an untapped creature that's attacking or blocking to convoke a spell won't cause that creature to stop attacking or blocking.