At the beginning of your upkeep, you may flip a coin. If you win the flip, put a fuse counter on this enchantment. If you lose the flip, remove a fuse counter from this enchantment. Remove five fuse counters from this enchantment and sacrifice it: It deals 20 damage to target player or planeswalker.
Whenever this creature attacks and isn't blocked, you may pay {R}. If you do, destroy target artifact defending player controls and this creature assigns no combat damage this turn.
Cumulative upkeep {2} When a player doesn't pay this enchantment's cumulative upkeep, this enchantment deals X damage to target player or planeswalker and each creature that player or that planeswalker's controller controls, where X is twice the number of age counters on this enchantment minus 2.
This creature enters with four shell counters on it. At the beginning of your upkeep, remove a shell counter from this creature. As long as this creature has no shell counters on it, it gets +3/+2 and has flying.
Cast this spell only during the declare blockers step. X target attacking creatures become blocked. Choking Vines deals 1 damage to each of those creatures.