Name:Striding Shotcaller
ManaCost:G U
Types:Creature Troll Druid
PT:0/4
K:Reach
T:Mode$ DamageDoneOnce | CombatDamage$ True | ValidSource$ Creature.YouCtrl | TriggerZones$ Battlefield | ValidTarget$ Player | Execute$ TrigPrepare | TriggerDescription$ Whenever one or more creatures you control deal combat damage to a player, this creature becomes prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)
SVar:TrigPrepare:DB$ AlterAttribute | Attributes$ Prepared
AlternateMode:Prepare
Oracle:Reach\nWhenever one or more creatures you control deal combat damage to a player, this creature becomes prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

ALTERNATE

Name:Run the Play
ManaCost:X G U
Types:Sorcery
A:SP$ PutCounter | CounterNum$ 1 | CounterType$ P1P1 | TargetMin$ 0 | TargetMax$ X | ValidTgts$ Creature | TgtPrompt$ Select X target creatures | SubAbility$ DBPump | SpellDescription$ Put a +1/+1 counter on each of up to X target creatures. Those creatures gain flying until end of turn. Draw a card.
SVar:DBPump:DB$ Pump | Defined$ Targeted | KW$ Flying | SubAbility$ DBDraw
SVar:DBDraw:DB$ Draw
SVar:X:Count$xPaid
Oracle:Put a +1/+1 counter on each of up to X target creatures. Those creatures gain flying until end of turn. Draw a card.
